Home / 861,471.60-1,292,207.40-389,079.60

Finding the Fourth Proportional to 861,471.60, 1,292,207.40 and 389,079.60

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Solution

The fourth proportional to 861,471.60, 1,292,207.40 and 389,079.60 is: 583,619.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,471.60 : 1,292,207.40 = 389,079.60 : x
  2. Step 2: Convert to fraction form
    861,471.60/1,292,207.40 = 389,079.60/x
  3. Step 3: Cross multiply
    861,471.60x = 1,292,207.40 × 389,079.60
  4. Step 4: Simplify right side
    861,471.60x = 502,771,538,309.04
  5. Step 5: Solve for x
    x = 502,771,538,309.04/861,471.60
  6. Step 6: Final answer
    x = 583,619.40

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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.