Home / 1,445.15-2,167.21-520.46

Finding the Fourth Proportional to 1,445.15, 2,167.21 and 520.46

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Solution

The fourth proportional to 1,445.15, 2,167.21 and 520.46 is: 780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.15 : 2,167.21 = 520.46 : x
  2. Step 2: Convert to fraction form
    1,445.15/2,167.21 = 520.46/x
  3. Step 3: Cross multiply
    1,445.15x = 2,167.21 × 520.46
  4. Step 4: Simplify right side
    1,445.15x = 1,127,937.34
  5. Step 5: Solve for x
    x = 1,127,937.34/1,445.15
  6. Step 6: Final answer
    x = 780.50

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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.