Home / 398,831.20-598,246.80-257,113.60

Finding the Fourth Proportional to 398,831.20, 598,246.80 and 257,113.60

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Solution

The fourth proportional to 398,831.20, 598,246.80 and 257,113.60 is: 385,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,831.20 : 598,246.80 = 257,113.60 : x
  2. Step 2: Convert to fraction form
    398,831.20/598,246.80 = 257,113.60/x
  3. Step 3: Cross multiply
    398,831.20x = 598,246.80 × 257,113.60
  4. Step 4: Simplify right side
    398,831.20x = 153,817,388,436.48
  5. Step 5: Solve for x
    x = 153,817,388,436.48/398,831.20
  6. Step 6: Final answer
    x = 385,670.40

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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.