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Finding the Fourth Proportional to 391,549.20, 546,987.90 and 391,549.20

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Solution

The fourth proportional to 391,549.20, 546,987.90 and 391,549.20 is: 546,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,549.20 : 546,987.90 = 391,549.20 : x
  2. Step 2: Convert to fraction form
    391,549.20/546,987.90 = 391,549.20/x
  3. Step 3: Cross multiply
    391,549.20x = 546,987.90 × 391,549.20
  4. Step 4: Simplify right side
    391,549.20x = 214,172,674,654.68
  5. Step 5: Solve for x
    x = 214,172,674,654.68/391,549.20
  6. Step 6: Final answer
    x = 546,987.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.