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Finding the Fourth Proportional to 480,641.60, 720,962.40 and 418,433.60

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Solution

The fourth proportional to 480,641.60, 720,962.40 and 418,433.60 is: 627,650.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,641.60 : 720,962.40 = 418,433.60 : x
  2. Step 2: Convert to fraction form
    480,641.60/720,962.40 = 418,433.60/x
  3. Step 3: Cross multiply
    480,641.60x = 720,962.40 × 418,433.60
  4. Step 4: Simplify right side
    480,641.60x = 301,674,892,496.64
  5. Step 5: Solve for x
    x = 301,674,892,496.64/480,641.60
  6. Step 6: Final answer
    x = 627,650.40

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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.