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Finding the Fourth Proportional to 390,614.44, 539,043.24 and 229,484.20

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Solution

The fourth proportional to 390,614.44, 539,043.24 and 229,484.20 is: 316,685.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,614.44 : 539,043.24 = 229,484.20 : x
  2. Step 2: Convert to fraction form
    390,614.44/539,043.24 = 229,484.20/x
  3. Step 3: Cross multiply
    390,614.44x = 539,043.24 × 229,484.20
  4. Step 4: Simplify right side
    390,614.44x = 123,701,906,696.81
  5. Step 5: Solve for x
    x = 123,701,906,696.81/390,614.44
  6. Step 6: Final answer
    x = 316,685.44

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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.