Home / 1,559.04-2,151.52-860.40

Finding the Fourth Proportional to 1,559.04, 2,151.52 and 860.40

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Solution

The fourth proportional to 1,559.04, 2,151.52 and 860.40 is: 1,187.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.04 : 2,151.52 = 860.40 : x
  2. Step 2: Convert to fraction form
    1,559.04/2,151.52 = 860.40/x
  3. Step 3: Cross multiply
    1,559.04x = 2,151.52 × 860.40
  4. Step 4: Simplify right side
    1,559.04x = 1,851,167.81
  5. Step 5: Solve for x
    x = 1,851,167.81/1,559.04
  6. Step 6: Final answer
    x = 1,187.38

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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.