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Finding the Fourth Proportional to 390,118.20, 585,323.10 and 153,625.74

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Solution

The fourth proportional to 390,118.20, 585,323.10 and 153,625.74 is: 230,496.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,118.20 : 585,323.10 = 153,625.74 : x
  2. Step 2: Convert to fraction form
    390,118.20/585,323.10 = 153,625.74/x
  3. Step 3: Cross multiply
    390,118.20x = 585,323.10 × 153,625.74
  4. Step 4: Simplify right side
    390,118.20x = 89,920,694,376.59
  5. Step 5: Solve for x
    x = 89,920,694,376.59/390,118.20
  6. Step 6: Final answer
    x = 230,496.02

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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.