Home / 1,410.40-2,115.60-918.33

Finding the Fourth Proportional to 1,410.40, 2,115.60 and 918.33

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Solution

The fourth proportional to 1,410.40, 2,115.60 and 918.33 is: 1,377.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.40 : 2,115.60 = 918.33 : x
  2. Step 2: Convert to fraction form
    1,410.40/2,115.60 = 918.33/x
  3. Step 3: Cross multiply
    1,410.40x = 2,115.60 × 918.33
  4. Step 4: Simplify right side
    1,410.40x = 1,942,818.95
  5. Step 5: Solve for x
    x = 1,942,818.95/1,410.40
  6. Step 6: Final answer
    x = 1,377.50

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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.