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Finding the Fourth Proportional to 678,332.80, 936,102.88 and 423,831.60

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Solution

The fourth proportional to 678,332.80, 936,102.88 and 423,831.60 is: 584,889.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,332.80 : 936,102.88 = 423,831.60 : x
  2. Step 2: Convert to fraction form
    678,332.80/936,102.88 = 423,831.60/x
  3. Step 3: Cross multiply
    678,332.80x = 936,102.88 × 423,831.60
  4. Step 4: Simplify right side
    678,332.80x = 396,749,981,395.01
  5. Step 5: Solve for x
    x = 396,749,981,395.01/678,332.80
  6. Step 6: Final answer
    x = 584,889.87

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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.