Home / 811,807.20-1,217,787.60-220,831.20

Finding the Fourth Proportional to 811,807.20, 1,217,787.60 and 220,831.20

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Solution

The fourth proportional to 811,807.20, 1,217,787.60 and 220,831.20 is: 331,267.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,807.20 : 1,217,787.60 = 220,831.20 : x
  2. Step 2: Convert to fraction form
    811,807.20/1,217,787.60 = 220,831.20/x
  3. Step 3: Cross multiply
    811,807.20x = 1,217,787.60 × 220,831.20
  4. Step 4: Simplify right side
    811,807.20x = 268,925,497,053.12
  5. Step 5: Solve for x
    x = 268,925,497,053.12/811,807.20
  6. Step 6: Final answer
    x = 331,267.69

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1.5x scale

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.