Home / 1,543.38-2,130.16-1,071.12

Finding the Fourth Proportional to 1,543.38, 2,130.16 and 1,071.12

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Solution

The fourth proportional to 1,543.38, 2,130.16 and 1,071.12 is: 1,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.38 : 2,130.16 = 1,071.12 : x
  2. Step 2: Convert to fraction form
    1,543.38/2,130.16 = 1,071.12/x
  3. Step 3: Cross multiply
    1,543.38x = 2,130.16 × 1,071.12
  4. Step 4: Simplify right side
    1,543.38x = 2,281,656.98
  5. Step 5: Solve for x
    x = 2,281,656.98/1,543.38
  6. Step 6: Final answer
    x = 1,478.35

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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.