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Finding the Fourth Proportional to 418,979.34, 578,204.58 and 237,698.91

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Solution

The fourth proportional to 418,979.34, 578,204.58 and 237,698.91 is: 328,031.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,979.34 : 578,204.58 = 237,698.91 : x
  2. Step 2: Convert to fraction form
    418,979.34/578,204.58 = 237,698.91/x
  3. Step 3: Cross multiply
    418,979.34x = 578,204.58 × 237,698.91
  4. Step 4: Simplify right side
    418,979.34x = 137,438,598,423.01
  5. Step 5: Solve for x
    x = 137,438,598,423.01/418,979.34
  6. Step 6: Final answer
    x = 328,031.92

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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.