Home / 1,394.20-1,924.11-870.13

Finding the Fourth Proportional to 1,394.20, 1,924.11 and 870.13

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Solution

The fourth proportional to 1,394.20, 1,924.11 and 870.13 is: 1,200.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.20 : 1,924.11 = 870.13 : x
  2. Step 2: Convert to fraction form
    1,394.20/1,924.11 = 870.13/x
  3. Step 3: Cross multiply
    1,394.20x = 1,924.11 × 870.13
  4. Step 4: Simplify right side
    1,394.20x = 1,674,225.83
  5. Step 5: Solve for x
    x = 1,674,225.83/1,394.20
  6. Step 6: Final answer
    x = 1,200.85

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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.