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Finding the Fourth Proportional to 390,557.34, 585,811.26 and 124,508.76

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Solution

The fourth proportional to 390,557.34, 585,811.26 and 124,508.76 is: 186,755.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,557.34 : 585,811.26 = 124,508.76 : x
  2. Step 2: Convert to fraction form
    390,557.34/585,811.26 = 124,508.76/x
  3. Step 3: Cross multiply
    390,557.34x = 585,811.26 × 124,508.76
  4. Step 4: Simplify right side
    390,557.34x = 72,938,633,576.64
  5. Step 5: Solve for x
    x = 72,938,633,576.64/390,557.34
  6. Step 6: Final answer
    x = 186,755.25

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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.