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Finding the Fourth Proportional to 664,143.30, 916,510.12 and 373,753.74

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Solution

The fourth proportional to 664,143.30, 916,510.12 and 373,753.74 is: 515,775.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,143.30 : 916,510.12 = 373,753.74 : x
  2. Step 2: Convert to fraction form
    664,143.30/916,510.12 = 373,753.74/x
  3. Step 3: Cross multiply
    664,143.30x = 916,510.12 × 373,753.74
  4. Step 4: Simplify right side
    664,143.30x = 342,549,085,097.85
  5. Step 5: Solve for x
    x = 342,549,085,097.85/664,143.30
  6. Step 6: Final answer
    x = 515,775.87

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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.