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Finding the Fourth Proportional to 390,690.72, 586,058.76 and 150,805.98

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Solution

The fourth proportional to 390,690.72, 586,058.76 and 150,805.98 is: 226,217.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,690.72 : 586,058.76 = 150,805.98 : x
  2. Step 2: Convert to fraction form
    390,690.72/586,058.76 = 150,805.98/x
  3. Step 3: Cross multiply
    390,690.72x = 586,058.76 × 150,805.98
  4. Step 4: Simplify right side
    390,690.72x = 88,381,165,639.38
  5. Step 5: Solve for x
    x = 88,381,165,639.38/390,690.72
  6. Step 6: Final answer
    x = 226,217.72

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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.