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Finding the Fourth Proportional to 605,639.40, 908,459.10 and 381,690.60

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Solution

The fourth proportional to 605,639.40, 908,459.10 and 381,690.60 is: 572,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,639.40 : 908,459.10 = 381,690.60 : x
  2. Step 2: Convert to fraction form
    605,639.40/908,459.10 = 381,690.60/x
  3. Step 3: Cross multiply
    605,639.40x = 908,459.10 × 381,690.60
  4. Step 4: Simplify right side
    605,639.40x = 346,750,298,954.46
  5. Step 5: Solve for x
    x = 346,750,298,954.46/605,639.40
  6. Step 6: Final answer
    x = 572,535.90

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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.