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Finding the Fourth Proportional to 279,007.38, 385,013.84 and 151,681.86

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Solution

The fourth proportional to 279,007.38, 385,013.84 and 151,681.86 is: 209,312.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,007.38 : 385,013.84 = 151,681.86 : x
  2. Step 2: Convert to fraction form
    279,007.38/385,013.84 = 151,681.86/x
  3. Step 3: Cross multiply
    279,007.38x = 385,013.84 × 151,681.86
  4. Step 4: Simplify right side
    279,007.38x = 58,399,614,618.53
  5. Step 5: Solve for x
    x = 58,399,614,618.53/279,007.38
  6. Step 6: Final answer
    x = 209,312.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.