Home / 1,478.60-2,039.70-918.92

Finding the Fourth Proportional to 1,478.60, 2,039.70 and 918.92

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Solution

The fourth proportional to 1,478.60, 2,039.70 and 918.92 is: 1,267.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.60 : 2,039.70 = 918.92 : x
  2. Step 2: Convert to fraction form
    1,478.60/2,039.70 = 918.92/x
  3. Step 3: Cross multiply
    1,478.60x = 2,039.70 × 918.92
  4. Step 4: Simplify right side
    1,478.60x = 1,874,321.12
  5. Step 5: Solve for x
    x = 1,874,321.12/1,478.60
  6. Step 6: Final answer
    x = 1,267.63

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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.