Home / 1,381.02-2,070.09-558.15

Finding the Fourth Proportional to 1,381.02, 2,070.09 and 558.15

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Solution

The fourth proportional to 1,381.02, 2,070.09 and 558.15 is: 836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.02 : 2,070.09 = 558.15 : x
  2. Step 2: Convert to fraction form
    1,381.02/2,070.09 = 558.15/x
  3. Step 3: Cross multiply
    1,381.02x = 2,070.09 × 558.15
  4. Step 4: Simplify right side
    1,381.02x = 1,155,420.73
  5. Step 5: Solve for x
    x = 1,155,420.73/1,381.02
  6. Step 6: Final answer
    x = 836.64

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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.