Home / 1,555.18-2,340.28-1,279.55

Finding the Fourth Proportional to 1,555.18, 2,340.28 and 1,279.55

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Solution

The fourth proportional to 1,555.18, 2,340.28 and 1,279.55 is: 1,925.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.18 : 2,340.28 = 1,279.55 : x
  2. Step 2: Convert to fraction form
    1,555.18/2,340.28 = 1,279.55/x
  3. Step 3: Cross multiply
    1,555.18x = 2,340.28 × 1,279.55
  4. Step 4: Simplify right side
    1,555.18x = 2,994,492.36
  5. Step 5: Solve for x
    x = 2,994,492.36/1,555.18
  6. Step 6: Final answer
    x = 1,925.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.