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Finding the Fourth Proportional to 579,699.60, 869,549.40 and 486,387.60

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Solution

The fourth proportional to 579,699.60, 869,549.40 and 486,387.60 is: 729,581.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,699.60 : 869,549.40 = 486,387.60 : x
  2. Step 2: Convert to fraction form
    579,699.60/869,549.40 = 486,387.60/x
  3. Step 3: Cross multiply
    579,699.60x = 869,549.40 × 486,387.60
  4. Step 4: Simplify right side
    579,699.60x = 422,938,045,747.44
  5. Step 5: Solve for x
    x = 422,938,045,747.44/579,699.60
  6. Step 6: Final answer
    x = 729,581.40

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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.