Home / 484,818.40-726,352.80-428,831.20

Finding the Fourth Proportional to 484,818.40, 726,352.80 and 428,831.20

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Solution

The fourth proportional to 484,818.40, 726,352.80 and 428,831.20 is: 642,473.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,818.40 : 726,352.80 = 428,831.20 : x
  2. Step 2: Convert to fraction form
    484,818.40/726,352.80 = 428,831.20/x
  3. Step 3: Cross multiply
    484,818.40x = 726,352.80 × 428,831.20
  4. Step 4: Simplify right side
    484,818.40x = 311,482,742,847.36
  5. Step 5: Solve for x
    x = 311,482,742,847.36/484,818.40
  6. Step 6: Final answer
    x = 642,473.02

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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.