Home / 1,380.02-2,070.60-917.96

Finding the Fourth Proportional to 1,380.02, 2,070.60 and 917.96

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Solution

The fourth proportional to 1,380.02, 2,070.60 and 917.96 is: 1,377.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.02 : 2,070.60 = 917.96 : x
  2. Step 2: Convert to fraction form
    1,380.02/2,070.60 = 917.96/x
  3. Step 3: Cross multiply
    1,380.02x = 2,070.60 × 917.96
  4. Step 4: Simplify right side
    1,380.02x = 1,900,727.98
  5. Step 5: Solve for x
    x = 1,900,727.98/1,380.02
  6. Step 6: Final answer
    x = 1,377.32

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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.