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Finding the Fourth Proportional to 642,725.80, 964,088.70 and 476,837.80

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Solution

The fourth proportional to 642,725.80, 964,088.70 and 476,837.80 is: 715,256.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,725.80 : 964,088.70 = 476,837.80 : x
  2. Step 2: Convert to fraction form
    642,725.80/964,088.70 = 476,837.80/x
  3. Step 3: Cross multiply
    642,725.80x = 964,088.70 × 476,837.80
  4. Step 4: Simplify right side
    642,725.80x = 459,713,934,712.86
  5. Step 5: Solve for x
    x = 459,713,934,712.86/642,725.80
  6. Step 6: Final answer
    x = 715,256.70

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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.