Home / 282,831.42-390,308.79-155,515.20

Finding the Fourth Proportional to 282,831.42, 390,308.79 and 155,515.20

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Solution

The fourth proportional to 282,831.42, 390,308.79 and 155,515.20 is: 214,611.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,831.42 : 390,308.79 = 155,515.20 : x
  2. Step 2: Convert to fraction form
    282,831.42/390,308.79 = 155,515.20/x
  3. Step 3: Cross multiply
    282,831.42x = 390,308.79 × 155,515.20
  4. Step 4: Simplify right side
    282,831.42x = 60,698,949,538.61
  5. Step 5: Solve for x
    x = 60,698,949,538.61/282,831.42
  6. Step 6: Final answer
    x = 214,611.76

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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.