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Finding the Fourth Proportional to 579,381.60, 869,072.40 and 479,848.80

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Solution

The fourth proportional to 579,381.60, 869,072.40 and 479,848.80 is: 719,773.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,381.60 : 869,072.40 = 479,848.80 : x
  2. Step 2: Convert to fraction form
    579,381.60/869,072.40 = 479,848.80/x
  3. Step 3: Cross multiply
    579,381.60x = 869,072.40 × 479,848.80
  4. Step 4: Simplify right side
    579,381.60x = 417,023,348,253.12
  5. Step 5: Solve for x
    x = 417,023,348,253.12/579,381.60
  6. Step 6: Final answer
    x = 719,773.20

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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.