Home / 1,557.32-2,148.93-885.11

Finding the Fourth Proportional to 1,557.32, 2,148.93 and 885.11

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Solution

The fourth proportional to 1,557.32, 2,148.93 and 885.11 is: 1,221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.32 : 2,148.93 = 885.11 : x
  2. Step 2: Convert to fraction form
    1,557.32/2,148.93 = 885.11/x
  3. Step 3: Cross multiply
    1,557.32x = 2,148.93 × 885.11
  4. Step 4: Simplify right side
    1,557.32x = 1,902,028.69
  5. Step 5: Solve for x
    x = 1,902,028.69/1,557.32
  6. Step 6: Final answer
    x = 1,221.35

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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.