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Finding the Fourth Proportional to 687,251.56, 948,454.50 and 385,465

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Solution

The fourth proportional to 687,251.56, 948,454.50 and 385,465 is: 531,968.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,251.56 : 948,454.50 = 385,465 : x
  2. Step 2: Convert to fraction form
    687,251.56/948,454.50 = 385,465/x
  3. Step 3: Cross multiply
    687,251.56x = 948,454.50 × 385,465
  4. Step 4: Simplify right side
    687,251.56x = 365,596,013,842.50
  5. Step 5: Solve for x
    x = 365,596,013,842.50/687,251.56
  6. Step 6: Final answer
    x = 531,968.26

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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.