Home / 1,275.60-1,897.08-1,178.40

Finding the Fourth Proportional to 1,275.60, 1,897.08 and 1,178.40

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Solution

The fourth proportional to 1,275.60, 1,897.08 and 1,178.40 is: 1,752.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.60 : 1,897.08 = 1,178.40 : x
  2. Step 2: Convert to fraction form
    1,275.60/1,897.08 = 1,178.40/x
  3. Step 3: Cross multiply
    1,275.60x = 1,897.08 × 1,178.40
  4. Step 4: Simplify right side
    1,275.60x = 2,235,519.07
  5. Step 5: Solve for x
    x = 2,235,519.07/1,275.60
  6. Step 6: Final answer
    x = 1,752.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.