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Finding the Fourth Proportional to 628,000.60, 942,000.90 and 391,610.20

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Solution

The fourth proportional to 628,000.60, 942,000.90 and 391,610.20 is: 587,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,000.60 : 942,000.90 = 391,610.20 : x
  2. Step 2: Convert to fraction form
    628,000.60/942,000.90 = 391,610.20/x
  3. Step 3: Cross multiply
    628,000.60x = 942,000.90 × 391,610.20
  4. Step 4: Simplify right side
    628,000.60x = 368,897,160,849.18
  5. Step 5: Solve for x
    x = 368,897,160,849.18/628,000.60
  6. Step 6: Final answer
    x = 587,415.30

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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.