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Finding the Fourth Proportional to 390,577.20, 585,859.59 and 124,333.85

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Solution

The fourth proportional to 390,577.20, 585,859.59 and 124,333.85 is: 186,498.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,577.20 : 585,859.59 = 124,333.85 : x
  2. Step 2: Convert to fraction form
    390,577.20/585,859.59 = 124,333.85/x
  3. Step 3: Cross multiply
    390,577.20x = 585,859.59 × 124,333.85
  4. Step 4: Simplify right side
    390,577.20x = 72,842,175,454.82
  5. Step 5: Solve for x
    x = 72,842,175,454.82/390,577.20
  6. Step 6: Final answer
    x = 186,498.79

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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.