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Finding the Fourth Proportional to 409,904.20, 615,317.10 and 316,822.60

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Solution

The fourth proportional to 409,904.20, 615,317.10 and 316,822.60 is: 475,590.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,904.20 : 615,317.10 = 316,822.60 : x
  2. Step 2: Convert to fraction form
    409,904.20/615,317.10 = 316,822.60/x
  3. Step 3: Cross multiply
    409,904.20x = 615,317.10 × 316,822.60
  4. Step 4: Simplify right side
    409,904.20x = 194,946,363,446.46
  5. Step 5: Solve for x
    x = 194,946,363,446.46/409,904.20
  6. Step 6: Final answer
    x = 475,590.06

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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.