Home / 285,831.20-428,746.80-98,861.60

Finding the Fourth Proportional to 285,831.20, 428,746.80 and 98,861.60

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Solution

The fourth proportional to 285,831.20, 428,746.80 and 98,861.60 is: 148,292.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,831.20 : 428,746.80 = 98,861.60 : x
  2. Step 2: Convert to fraction form
    285,831.20/428,746.80 = 98,861.60/x
  3. Step 3: Cross multiply
    285,831.20x = 428,746.80 × 98,861.60
  4. Step 4: Simplify right side
    285,831.20x = 42,386,594,642.88
  5. Step 5: Solve for x
    x = 42,386,594,642.88/285,831.20
  6. Step 6: Final answer
    x = 148,292.40

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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.