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Finding the Fourth Proportional to 478,522.60, 717,783.90 and 431,283.40

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Solution

The fourth proportional to 478,522.60, 717,783.90 and 431,283.40 is: 646,925.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,522.60 : 717,783.90 = 431,283.40 : x
  2. Step 2: Convert to fraction form
    478,522.60/717,783.90 = 431,283.40/x
  3. Step 3: Cross multiply
    478,522.60x = 717,783.90 × 431,283.40
  4. Step 4: Simplify right side
    478,522.60x = 309,568,280,857.26
  5. Step 5: Solve for x
    x = 309,568,280,857.26/478,522.60
  6. Step 6: Final answer
    x = 646,925.10

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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.