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Finding the Fourth Proportional to 500,479.68, 690,655.32 and 274,125.36

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Solution

The fourth proportional to 500,479.68, 690,655.32 and 274,125.36 is: 378,289.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,479.68 : 690,655.32 = 274,125.36 : x
  2. Step 2: Convert to fraction form
    500,479.68/690,655.32 = 274,125.36/x
  3. Step 3: Cross multiply
    500,479.68x = 690,655.32 × 274,125.36
  4. Step 4: Simplify right side
    500,479.68x = 189,326,138,230.92
  5. Step 5: Solve for x
    x = 189,326,138,230.92/500,479.68
  6. Step 6: Final answer
    x = 378,289.36

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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.