Home / 1,167.39-1,607.58-1,009.80

Finding the Fourth Proportional to 1,167.39, 1,607.58 and 1,009.80

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Solution

The fourth proportional to 1,167.39, 1,607.58 and 1,009.80 is: 1,390.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.39 : 1,607.58 = 1,009.80 : x
  2. Step 2: Convert to fraction form
    1,167.39/1,607.58 = 1,009.80/x
  3. Step 3: Cross multiply
    1,167.39x = 1,607.58 × 1,009.80
  4. Step 4: Simplify right side
    1,167.39x = 1,623,334.28
  5. Step 5: Solve for x
    x = 1,623,334.28/1,167.39
  6. Step 6: Final answer
    x = 1,390.57

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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.