Home / 1,572.40-2,166.78-1,151.92

Finding the Fourth Proportional to 1,572.40, 2,166.78 and 1,151.92

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Solution

The fourth proportional to 1,572.40, 2,166.78 and 1,151.92 is: 1,587.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.40 : 2,166.78 = 1,151.92 : x
  2. Step 2: Convert to fraction form
    1,572.40/2,166.78 = 1,151.92/x
  3. Step 3: Cross multiply
    1,572.40x = 2,166.78 × 1,151.92
  4. Step 4: Simplify right side
    1,572.40x = 2,495,957.22
  5. Step 5: Solve for x
    x = 2,495,957.22/1,572.40
  6. Step 6: Final answer
    x = 1,587.36

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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.