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Finding the Fourth Proportional to 319,359.40, 478,866.30 and 132,389.80

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Solution

The fourth proportional to 319,359.40, 478,866.30 and 132,389.80 is: 198,513.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,359.40 : 478,866.30 = 132,389.80 : x
  2. Step 2: Convert to fraction form
    319,359.40/478,866.30 = 132,389.80/x
  3. Step 3: Cross multiply
    319,359.40x = 478,866.30 × 132,389.80
  4. Step 4: Simplify right side
    319,359.40x = 63,397,013,683.74
  5. Step 5: Solve for x
    x = 63,397,013,683.74/319,359.40
  6. Step 6: Final answer
    x = 198,513.07

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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.