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Finding the Fourth Proportional to 663,317, 915,402.16 and 376,885.60

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Solution

The fourth proportional to 663,317, 915,402.16 and 376,885.60 is: 520,116.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,317 : 915,402.16 = 376,885.60 : x
  2. Step 2: Convert to fraction form
    663,317/915,402.16 = 376,885.60/x
  3. Step 3: Cross multiply
    663,317x = 915,402.16 × 376,885.60
  4. Step 4: Simplify right side
    663,317x = 345,001,892,312.90
  5. Step 5: Solve for x
    x = 345,001,892,312.90/663,317
  6. Step 6: Final answer
    x = 520,116.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.