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Finding the Fourth Proportional to 256,776.02, 385,329.28 and 138,528.98

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Solution

The fourth proportional to 256,776.02, 385,329.28 and 138,528.98 is: 207,882.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,776.02 : 385,329.28 = 138,528.98 : x
  2. Step 2: Convert to fraction form
    256,776.02/385,329.28 = 138,528.98/x
  3. Step 3: Cross multiply
    256,776.02x = 385,329.28 × 138,528.98
  4. Step 4: Simplify right side
    256,776.02x = 53,379,272,122.53
  5. Step 5: Solve for x
    x = 53,379,272,122.53/256,776.02
  6. Step 6: Final answer
    x = 207,882.62

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1.5x scale

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.