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Finding the Fourth Proportional to 691,638.58, 954,459.35 and 385,715.28

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Solution

The fourth proportional to 691,638.58, 954,459.35 and 385,715.28 is: 532,286.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,638.58 : 954,459.35 = 385,715.28 : x
  2. Step 2: Convert to fraction form
    691,638.58/954,459.35 = 385,715.28/x
  3. Step 3: Cross multiply
    691,638.58x = 954,459.35 × 385,715.28
  4. Step 4: Simplify right side
    691,638.58x = 368,149,558,530.95
  5. Step 5: Solve for x
    x = 368,149,558,530.95/691,638.58
  6. Step 6: Final answer
    x = 532,286.04

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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.