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Finding the Fourth Proportional to 644,138.10, 966,207.15 and 360,702.90

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Solution

The fourth proportional to 644,138.10, 966,207.15 and 360,702.90 is: 541,054.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,138.10 : 966,207.15 = 360,702.90 : x
  2. Step 2: Convert to fraction form
    644,138.10/966,207.15 = 360,702.90/x
  3. Step 3: Cross multiply
    644,138.10x = 966,207.15 × 360,702.90
  4. Step 4: Simplify right side
    644,138.10x = 348,513,721,005.74
  5. Step 5: Solve for x
    x = 348,513,721,005.74/644,138.10
  6. Step 6: Final answer
    x = 541,054.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.