Home / 1,655.78-2,285.21-1,089.13

Finding the Fourth Proportional to 1,655.78, 2,285.21 and 1,089.13

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Solution

The fourth proportional to 1,655.78, 2,285.21 and 1,089.13 is: 1,503.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.78 : 2,285.21 = 1,089.13 : x
  2. Step 2: Convert to fraction form
    1,655.78/2,285.21 = 1,089.13/x
  3. Step 3: Cross multiply
    1,655.78x = 2,285.21 × 1,089.13
  4. Step 4: Simplify right side
    1,655.78x = 2,488,892.06
  5. Step 5: Solve for x
    x = 2,488,892.06/1,655.78
  6. Step 6: Final answer
    x = 1,503.16

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1.5x scale

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.