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Finding the Fourth Proportional to 318,948.60, 478,422.90 and 299,265.60

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Solution

The fourth proportional to 318,948.60, 478,422.90 and 299,265.60 is: 448,898.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,948.60 : 478,422.90 = 299,265.60 : x
  2. Step 2: Convert to fraction form
    318,948.60/478,422.90 = 299,265.60/x
  3. Step 3: Cross multiply
    318,948.60x = 478,422.90 × 299,265.60
  4. Step 4: Simplify right side
    318,948.60x = 143,175,516,222.24
  5. Step 5: Solve for x
    x = 143,175,516,222.24/318,948.60
  6. Step 6: Final answer
    x = 448,898.40

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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.