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Finding the Fourth Proportional to 926.51, 1,278.14 and 553.36

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Solution

The fourth proportional to 926.51, 1,278.14 and 553.36 is: 763.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.51 : 1,278.14 = 553.36 : x
  2. Step 2: Convert to fraction form
    926.51/1,278.14 = 553.36/x
  3. Step 3: Cross multiply
    926.51x = 1,278.14 × 553.36
  4. Step 4: Simplify right side
    926.51x = 707,268.28
  5. Step 5: Solve for x
    x = 707,268.28/926.51
  6. Step 6: Final answer
    x = 763.37

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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.