Home / 1,319.60-1,819.56-1,123.76

Finding the Fourth Proportional to 1,319.60, 1,819.56 and 1,123.76

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Solution

The fourth proportional to 1,319.60, 1,819.56 and 1,123.76 is: 1,549.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.60 : 1,819.56 = 1,123.76 : x
  2. Step 2: Convert to fraction form
    1,319.60/1,819.56 = 1,123.76/x
  3. Step 3: Cross multiply
    1,319.60x = 1,819.56 × 1,123.76
  4. Step 4: Simplify right side
    1,319.60x = 2,044,748.75
  5. Step 5: Solve for x
    x = 2,044,748.75/1,319.60
  6. Step 6: Final answer
    x = 1,549.52

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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.