Home / 1,543.79-2,130.41-845.17

Finding the Fourth Proportional to 1,543.79, 2,130.41 and 845.17

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Solution

The fourth proportional to 1,543.79, 2,130.41 and 845.17 is: 1,166.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.79 : 2,130.41 = 845.17 : x
  2. Step 2: Convert to fraction form
    1,543.79/2,130.41 = 845.17/x
  3. Step 3: Cross multiply
    1,543.79x = 2,130.41 × 845.17
  4. Step 4: Simplify right side
    1,543.79x = 1,800,555.41
  5. Step 5: Solve for x
    x = 1,800,555.41/1,543.79
  6. Step 6: Final answer
    x = 1,166.32

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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.