Home / 658,045.40-987,528.90-421,962.20

Finding the Fourth Proportional to 658,045.40, 987,528.90 and 421,962.20

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Solution

The fourth proportional to 658,045.40, 987,528.90 and 421,962.20 is: 633,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,045.40 : 987,528.90 = 421,962.20 : x
  2. Step 2: Convert to fraction form
    658,045.40/987,528.90 = 421,962.20/x
  3. Step 3: Cross multiply
    658,045.40x = 987,528.90 × 421,962.20
  4. Step 4: Simplify right side
    658,045.40x = 416,699,867,207.58
  5. Step 5: Solve for x
    x = 416,699,867,207.58/658,045.40
  6. Step 6: Final answer
    x = 633,238.78

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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.