Home / 1,561.12-2,152.40-1,029.92

Finding the Fourth Proportional to 1,561.12, 2,152.40 and 1,029.92

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Solution

The fourth proportional to 1,561.12, 2,152.40 and 1,029.92 is: 1,420.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.12 : 2,152.40 = 1,029.92 : x
  2. Step 2: Convert to fraction form
    1,561.12/2,152.40 = 1,029.92/x
  3. Step 3: Cross multiply
    1,561.12x = 2,152.40 × 1,029.92
  4. Step 4: Simplify right side
    1,561.12x = 2,216,799.81
  5. Step 5: Solve for x
    x = 2,216,799.81/1,561.12
  6. Step 6: Final answer
    x = 1,420.01

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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.