Home / 457,867.80-686,315.70-221,056.20

Finding the Fourth Proportional to 457,867.80, 686,315.70 and 221,056.20

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Solution

The fourth proportional to 457,867.80, 686,315.70 and 221,056.20 is: 331,349.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,867.80 : 686,315.70 = 221,056.20 : x
  2. Step 2: Convert to fraction form
    457,867.80/686,315.70 = 221,056.20/x
  3. Step 3: Cross multiply
    457,867.80x = 686,315.70 × 221,056.20
  4. Step 4: Simplify right side
    457,867.80x = 151,714,340,642.34
  5. Step 5: Solve for x
    x = 151,714,340,642.34/457,867.80
  6. Step 6: Final answer
    x = 331,349.66

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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.