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Finding the Fourth Proportional to 390,348.60, 585,522.90 and 291,204.60

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Solution

The fourth proportional to 390,348.60, 585,522.90 and 291,204.60 is: 436,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,348.60 : 585,522.90 = 291,204.60 : x
  2. Step 2: Convert to fraction form
    390,348.60/585,522.90 = 291,204.60/x
  3. Step 3: Cross multiply
    390,348.60x = 585,522.90 × 291,204.60
  4. Step 4: Simplify right side
    390,348.60x = 170,506,961,885.34
  5. Step 5: Solve for x
    x = 170,506,961,885.34/390,348.60
  6. Step 6: Final answer
    x = 436,806.90

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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.