Home / 390,962.40-586,454.55-138,207.18

Finding the Fourth Proportional to 390,962.40, 586,454.55 and 138,207.18

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Solution

The fourth proportional to 390,962.40, 586,454.55 and 138,207.18 is: 207,314.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,962.40 : 586,454.55 = 138,207.18 : x
  2. Step 2: Convert to fraction form
    390,962.40/586,454.55 = 138,207.18/x
  3. Step 3: Cross multiply
    390,962.40x = 586,454.55 × 138,207.18
  4. Step 4: Simplify right side
    390,962.40x = 81,052,229,553.67
  5. Step 5: Solve for x
    x = 81,052,229,553.67/390,962.40
  6. Step 6: Final answer
    x = 207,314.64

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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.