Home / 645,249.29-890,438.61-358,766.87

Finding the Fourth Proportional to 645,249.29, 890,438.61 and 358,766.87

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Solution

The fourth proportional to 645,249.29, 890,438.61 and 358,766.87 is: 495,095.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,249.29 : 890,438.61 = 358,766.87 : x
  2. Step 2: Convert to fraction form
    645,249.29/890,438.61 = 358,766.87/x
  3. Step 3: Cross multiply
    645,249.29x = 890,438.61 × 358,766.87
  4. Step 4: Simplify right side
    645,249.29x = 319,459,868,584.66
  5. Step 5: Solve for x
    x = 319,459,868,584.66/645,249.29
  6. Step 6: Final answer
    x = 495,095.27

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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.