Home / 1,561.04-2,154.28-862.40

Finding the Fourth Proportional to 1,561.04, 2,154.28 and 862.40

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Solution

The fourth proportional to 1,561.04, 2,154.28 and 862.40 is: 1,190.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.04 : 2,154.28 = 862.40 : x
  2. Step 2: Convert to fraction form
    1,561.04/2,154.28 = 862.40/x
  3. Step 3: Cross multiply
    1,561.04x = 2,154.28 × 862.40
  4. Step 4: Simplify right side
    1,561.04x = 1,857,851.07
  5. Step 5: Solve for x
    x = 1,857,851.07/1,561.04
  6. Step 6: Final answer
    x = 1,190.14

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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.