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Finding the Fourth Proportional to 688,348.98, 949,915.89 and 386,536.50

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Solution

The fourth proportional to 688,348.98, 949,915.89 and 386,536.50 is: 533,417.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,348.98 : 949,915.89 = 386,536.50 : x
  2. Step 2: Convert to fraction form
    688,348.98/949,915.89 = 386,536.50/x
  3. Step 3: Cross multiply
    688,348.98x = 949,915.89 × 386,536.50
  4. Step 4: Simplify right side
    688,348.98x = 367,177,163,414.99
  5. Step 5: Solve for x
    x = 367,177,163,414.99/688,348.98
  6. Step 6: Final answer
    x = 533,417.17

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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.