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Finding the Fourth Proportional to 916.52, 1,265.38 and 706.31

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Solution

The fourth proportional to 916.52, 1,265.38 and 706.31 is: 975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.52 : 1,265.38 = 706.31 : x
  2. Step 2: Convert to fraction form
    916.52/1,265.38 = 706.31/x
  3. Step 3: Cross multiply
    916.52x = 1,265.38 × 706.31
  4. Step 4: Simplify right side
    916.52x = 893,750.55
  5. Step 5: Solve for x
    x = 893,750.55/916.52
  6. Step 6: Final answer
    x = 975.16

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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.