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Finding the Fourth Proportional to 637,685.71, 879,965.90 and 351,205.79

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Solution

The fourth proportional to 637,685.71, 879,965.90 and 351,205.79 is: 484,641.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,685.71 : 879,965.90 = 351,205.79 : x
  2. Step 2: Convert to fraction form
    637,685.71/879,965.90 = 351,205.79/x
  3. Step 3: Cross multiply
    637,685.71x = 879,965.90 × 351,205.79
  4. Step 4: Simplify right side
    637,685.71x = 309,049,123,148.72
  5. Step 5: Solve for x
    x = 309,049,123,148.72/637,685.71
  6. Step 6: Final answer
    x = 484,641.76

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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.