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Finding the Fourth Proportional to 476,612.65, 714,924.75 and 139,660.13

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Solution

The fourth proportional to 476,612.65, 714,924.75 and 139,660.13 is: 209,491.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,612.65 : 714,924.75 = 139,660.13 : x
  2. Step 2: Convert to fraction form
    476,612.65/714,924.75 = 139,660.13/x
  3. Step 3: Cross multiply
    476,612.65x = 714,924.75 × 139,660.13
  4. Step 4: Simplify right side
    476,612.65x = 99,846,485,836.25
  5. Step 5: Solve for x
    x = 99,846,485,836.25/476,612.65
  6. Step 6: Final answer
    x = 209,491.89

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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.