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Finding the Fourth Proportional to 390,666.12, 585,805.32 and 124,391.94

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Solution

The fourth proportional to 390,666.12, 585,805.32 and 124,391.94 is: 186,526.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,666.12 : 585,805.32 = 124,391.94 : x
  2. Step 2: Convert to fraction form
    390,666.12/585,805.32 = 124,391.94/x
  3. Step 3: Cross multiply
    390,666.12x = 585,805.32 × 124,391.94
  4. Step 4: Simplify right side
    390,666.12x = 72,869,460,217.12
  5. Step 5: Solve for x
    x = 72,869,460,217.12/390,666.12
  6. Step 6: Final answer
    x = 186,526.18

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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.