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Finding the Fourth Proportional to 390,924.20, 586,442.20 and 124,687.74

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Solution

The fourth proportional to 390,924.20, 586,442.20 and 124,687.74 is: 187,049.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,924.20 : 586,442.20 = 124,687.74 : x
  2. Step 2: Convert to fraction form
    390,924.20/586,442.20 = 124,687.74/x
  3. Step 3: Cross multiply
    390,924.20x = 586,442.20 × 124,687.74
  4. Step 4: Simplify right side
    390,924.20x = 73,122,152,558.63
  5. Step 5: Solve for x
    x = 73,122,152,558.63/390,924.20
  6. Step 6: Final answer
    x = 187,049.44

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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.