Home / 1,292.95-1,931.18-1,120.15

Finding the Fourth Proportional to 1,292.95, 1,931.18 and 1,120.15

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Solution

The fourth proportional to 1,292.95, 1,931.18 and 1,120.15 is: 1,673.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.95 : 1,931.18 = 1,120.15 : x
  2. Step 2: Convert to fraction form
    1,292.95/1,931.18 = 1,120.15/x
  3. Step 3: Cross multiply
    1,292.95x = 1,931.18 × 1,120.15
  4. Step 4: Simplify right side
    1,292.95x = 2,163,211.28
  5. Step 5: Solve for x
    x = 2,163,211.28/1,292.95
  6. Step 6: Final answer
    x = 1,673.08

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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.