Home / 765,854.01-1,056,869.62-421,682.78

Finding the Fourth Proportional to 765,854.01, 1,056,869.62 and 421,682.78

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Solution

The fourth proportional to 765,854.01, 1,056,869.62 and 421,682.78 is: 581,917.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,854.01 : 1,056,869.62 = 421,682.78 : x
  2. Step 2: Convert to fraction form
    765,854.01/1,056,869.62 = 421,682.78/x
  3. Step 3: Cross multiply
    765,854.01x = 1,056,869.62 × 421,682.78
  4. Step 4: Simplify right side
    765,854.01x = 445,663,712,066.38
  5. Step 5: Solve for x
    x = 445,663,712,066.38/765,854.01
  6. Step 6: Final answer
    x = 581,917.32

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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.