Home / 1,118.49-1,670.20-913.46

Finding the Fourth Proportional to 1,118.49, 1,670.20 and 913.46

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Solution

The fourth proportional to 1,118.49, 1,670.20 and 913.46 is: 1,364.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.49 : 1,670.20 = 913.46 : x
  2. Step 2: Convert to fraction form
    1,118.49/1,670.20 = 913.46/x
  3. Step 3: Cross multiply
    1,118.49x = 1,670.20 × 913.46
  4. Step 4: Simplify right side
    1,118.49x = 1,525,656.32
  5. Step 5: Solve for x
    x = 1,525,656.32/1,118.49
  6. Step 6: Final answer
    x = 1,364.04

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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.