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Finding the Fourth Proportional to 761.40, 1,051.31 and 669.24

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Solution

The fourth proportional to 761.40, 1,051.31 and 669.24 is: 924.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.40 : 1,051.31 = 669.24 : x
  2. Step 2: Convert to fraction form
    761.40/1,051.31 = 669.24/x
  3. Step 3: Cross multiply
    761.40x = 1,051.31 × 669.24
  4. Step 4: Simplify right side
    761.40x = 703,580.38
  5. Step 5: Solve for x
    x = 703,580.38/761.40
  6. Step 6: Final answer
    x = 924.06

Related Problems

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Half scale
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Double scale
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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.