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Finding the Fourth Proportional to 458,307.60, 687,461.40 and 309,008.40

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Solution

The fourth proportional to 458,307.60, 687,461.40 and 309,008.40 is: 463,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,307.60 : 687,461.40 = 309,008.40 : x
  2. Step 2: Convert to fraction form
    458,307.60/687,461.40 = 309,008.40/x
  3. Step 3: Cross multiply
    458,307.60x = 687,461.40 × 309,008.40
  4. Step 4: Simplify right side
    458,307.60x = 212,431,347,275.76
  5. Step 5: Solve for x
    x = 212,431,347,275.76/458,307.60
  6. Step 6: Final answer
    x = 463,512.60

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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.