Home / 645,463.20-890,750.66-358,983.42

Finding the Fourth Proportional to 645,463.20, 890,750.66 and 358,983.42

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Solution

The fourth proportional to 645,463.20, 890,750.66 and 358,983.42 is: 495,403.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,463.20 : 890,750.66 = 358,983.42 : x
  2. Step 2: Convert to fraction form
    645,463.20/890,750.66 = 358,983.42/x
  3. Step 3: Cross multiply
    645,463.20x = 890,750.66 × 358,983.42
  4. Step 4: Simplify right side
    645,463.20x = 319,764,718,294.06
  5. Step 5: Solve for x
    x = 319,764,718,294.06/645,463.20
  6. Step 6: Final answer
    x = 495,403.48

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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.