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Finding the Fourth Proportional to 662,423.70, 914,263.92 and 390,475.44

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Solution

The fourth proportional to 662,423.70, 914,263.92 and 390,475.44 is: 538,926.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,423.70 : 914,263.92 = 390,475.44 : x
  2. Step 2: Convert to fraction form
    662,423.70/914,263.92 = 390,475.44/x
  3. Step 3: Cross multiply
    662,423.70x = 914,263.92 × 390,475.44
  4. Step 4: Simplify right side
    662,423.70x = 356,997,606,438.13
  5. Step 5: Solve for x
    x = 356,997,606,438.13/662,423.70
  6. Step 6: Final answer
    x = 538,926.38

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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.