Home / 1,170.49-1,613.51-921.35

Finding the Fourth Proportional to 1,170.49, 1,613.51 and 921.35

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Solution

The fourth proportional to 1,170.49, 1,613.51 and 921.35 is: 1,270.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.49 : 1,613.51 = 921.35 : x
  2. Step 2: Convert to fraction form
    1,170.49/1,613.51 = 921.35/x
  3. Step 3: Cross multiply
    1,170.49x = 1,613.51 × 921.35
  4. Step 4: Simplify right side
    1,170.49x = 1,486,607.44
  5. Step 5: Solve for x
    x = 1,486,607.44/1,170.49
  6. Step 6: Final answer
    x = 1,270.07

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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.