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Finding the Fourth Proportional to 388,064.80, 581,665.20 and 151,328.80

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Solution

The fourth proportional to 388,064.80, 581,665.20 and 151,328.80 is: 226,824.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,064.80 : 581,665.20 = 151,328.80 : x
  2. Step 2: Convert to fraction form
    388,064.80/581,665.20 = 151,328.80/x
  3. Step 3: Cross multiply
    388,064.80x = 581,665.20 × 151,328.80
  4. Step 4: Simplify right side
    388,064.80x = 88,022,696,717.76
  5. Step 5: Solve for x
    x = 88,022,696,717.76/388,064.80
  6. Step 6: Final answer
    x = 226,824.74

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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.