Home / 1,543.79-2,130.91-1,151.35

Finding the Fourth Proportional to 1,543.79, 2,130.91 and 1,151.35

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Solution

The fourth proportional to 1,543.79, 2,130.91 and 1,151.35 is: 1,589.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.79 : 2,130.91 = 1,151.35 : x
  2. Step 2: Convert to fraction form
    1,543.79/2,130.91 = 1,151.35/x
  3. Step 3: Cross multiply
    1,543.79x = 2,130.91 × 1,151.35
  4. Step 4: Simplify right side
    1,543.79x = 2,453,415.02
  5. Step 5: Solve for x
    x = 2,453,415.02/1,543.79
  6. Step 6: Final answer
    x = 1,589.21

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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.