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Finding the Fourth Proportional to 656,873.20, 985,698.60 and 432,881.20

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Solution

The fourth proportional to 656,873.20, 985,698.60 and 432,881.20 is: 649,578.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,873.20 : 985,698.60 = 432,881.20 : x
  2. Step 2: Convert to fraction form
    656,873.20/985,698.60 = 432,881.20/x
  3. Step 3: Cross multiply
    656,873.20x = 985,698.60 × 432,881.20
  4. Step 4: Simplify right side
    656,873.20x = 426,690,392,806.32
  5. Step 5: Solve for x
    x = 426,690,392,806.32/656,873.20
  6. Step 6: Final answer
    x = 649,578.02

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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.