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Finding the Fourth Proportional to 566,391.90, 781,614.81 and 311,737.62

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Solution

The fourth proportional to 566,391.90, 781,614.81 and 311,737.62 is: 430,194.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,391.90 : 781,614.81 = 311,737.62 : x
  2. Step 2: Convert to fraction form
    566,391.90/781,614.81 = 311,737.62/x
  3. Step 3: Cross multiply
    566,391.90x = 781,614.81 × 311,737.62
  4. Step 4: Simplify right side
    566,391.90x = 243,658,740,626.15
  5. Step 5: Solve for x
    x = 243,658,740,626.15/566,391.90
  6. Step 6: Final answer
    x = 430,194.61

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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.