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Finding the Fourth Proportional to 861,657.60, 1,292,486.40 and 328,904.40

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Solution

The fourth proportional to 861,657.60, 1,292,486.40 and 328,904.40 is: 493,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,657.60 : 1,292,486.40 = 328,904.40 : x
  2. Step 2: Convert to fraction form
    861,657.60/1,292,486.40 = 328,904.40/x
  3. Step 3: Cross multiply
    861,657.60x = 1,292,486.40 × 328,904.40
  4. Step 4: Simplify right side
    861,657.60x = 425,104,463,900.16
  5. Step 5: Solve for x
    x = 425,104,463,900.16/861,657.60
  6. Step 6: Final answer
    x = 493,356.60

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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.