Home / 658,839.60-988,259.40-389,401.20

Finding the Fourth Proportional to 658,839.60, 988,259.40 and 389,401.20

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Solution

The fourth proportional to 658,839.60, 988,259.40 and 389,401.20 is: 584,101.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,839.60 : 988,259.40 = 389,401.20 : x
  2. Step 2: Convert to fraction form
    658,839.60/988,259.40 = 389,401.20/x
  3. Step 3: Cross multiply
    658,839.60x = 988,259.40 × 389,401.20
  4. Step 4: Simplify right side
    658,839.60x = 384,829,396,271.28
  5. Step 5: Solve for x
    x = 384,829,396,271.28/658,839.60
  6. Step 6: Final answer
    x = 584,101.80

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Double scale
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Similar ratio
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1.5x scale

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.