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Finding the Fourth Proportional to 861,805.80, 1,292,708.70 and 488,557.80

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Solution

The fourth proportional to 861,805.80, 1,292,708.70 and 488,557.80 is: 732,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,805.80 : 1,292,708.70 = 488,557.80 : x
  2. Step 2: Convert to fraction form
    861,805.80/1,292,708.70 = 488,557.80/x
  3. Step 3: Cross multiply
    861,805.80x = 1,292,708.70 × 488,557.80
  4. Step 4: Simplify right side
    861,805.80x = 631,562,918,512.86
  5. Step 5: Solve for x
    x = 631,562,918,512.86/861,805.80
  6. Step 6: Final answer
    x = 732,836.70

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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.