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Finding the Fourth Proportional to 663,746.40, 915,915.60 and 377,200.80

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Solution

The fourth proportional to 663,746.40, 915,915.60 and 377,200.80 is: 520,506.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,746.40 : 915,915.60 = 377,200.80 : x
  2. Step 2: Convert to fraction form
    663,746.40/915,915.60 = 377,200.80/x
  3. Step 3: Cross multiply
    663,746.40x = 915,915.60 × 377,200.80
  4. Step 4: Simplify right side
    663,746.40x = 345,484,097,052.48
  5. Step 5: Solve for x
    x = 345,484,097,052.48/663,746.40
  6. Step 6: Final answer
    x = 520,506.17

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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.