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Finding the Fourth Proportional to 689,812.81, 951,127.37 and 472,126.51

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Solution

The fourth proportional to 689,812.81, 951,127.37 and 472,126.51 is: 650,977.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,812.81 : 951,127.37 = 472,126.51 : x
  2. Step 2: Convert to fraction form
    689,812.81/951,127.37 = 472,126.51/x
  3. Step 3: Cross multiply
    689,812.81x = 951,127.37 × 472,126.51
  4. Step 4: Simplify right side
    689,812.81x = 449,052,442,188.26
  5. Step 5: Solve for x
    x = 449,052,442,188.26/689,812.81
  6. Step 6: Final answer
    x = 650,977.25

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.