Home / 917,654.25-1,266,327.65-509,781.78

Finding the Fourth Proportional to 917,654.25, 1,266,327.65 and 509,781.78

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Solution

The fourth proportional to 917,654.25, 1,266,327.65 and 509,781.78 is: 703,479.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,654.25 : 1,266,327.65 = 509,781.78 : x
  2. Step 2: Convert to fraction form
    917,654.25/1,266,327.65 = 509,781.78/x
  3. Step 3: Cross multiply
    917,654.25x = 1,266,327.65 × 509,781.78
  4. Step 4: Simplify right side
    917,654.25x = 645,550,760,931.31
  5. Step 5: Solve for x
    x = 645,550,760,931.31/917,654.25
  6. Step 6: Final answer
    x = 703,479.29

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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.