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Finding the Fourth Proportional to 612,114.60, 918,171.90 and 486,143.40

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Solution

The fourth proportional to 612,114.60, 918,171.90 and 486,143.40 is: 729,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,114.60 : 918,171.90 = 486,143.40 : x
  2. Step 2: Convert to fraction form
    612,114.60/918,171.90 = 486,143.40/x
  3. Step 3: Cross multiply
    612,114.60x = 918,171.90 × 486,143.40
  4. Step 4: Simplify right side
    612,114.60x = 446,363,209,250.46
  5. Step 5: Solve for x
    x = 446,363,209,250.46/612,114.60
  6. Step 6: Final answer
    x = 729,215.10

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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.