Home / 1,561.03-2,154.07-971.11

Finding the Fourth Proportional to 1,561.03, 2,154.07 and 971.11

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Solution

The fourth proportional to 1,561.03, 2,154.07 and 971.11 is: 1,340.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.03 : 2,154.07 = 971.11 : x
  2. Step 2: Convert to fraction form
    1,561.03/2,154.07 = 971.11/x
  3. Step 3: Cross multiply
    1,561.03x = 2,154.07 × 971.11
  4. Step 4: Simplify right side
    1,561.03x = 2,091,838.92
  5. Step 5: Solve for x
    x = 2,091,838.92/1,561.03
  6. Step 6: Final answer
    x = 1,340.04

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Double scale
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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.