Home / 520,831.40-781,247.10-307,941.80

Finding the Fourth Proportional to 520,831.40, 781,247.10 and 307,941.80

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Solution

The fourth proportional to 520,831.40, 781,247.10 and 307,941.80 is: 461,912.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,831.40 : 781,247.10 = 307,941.80 : x
  2. Step 2: Convert to fraction form
    520,831.40/781,247.10 = 307,941.80/x
  3. Step 3: Cross multiply
    520,831.40x = 781,247.10 × 307,941.80
  4. Step 4: Simplify right side
    520,831.40x = 240,578,638,218.78
  5. Step 5: Solve for x
    x = 240,578,638,218.78/520,831.40
  6. Step 6: Final answer
    x = 461,912.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.