Home / 1,543.23-2,128.98-1,045.70

Finding the Fourth Proportional to 1,543.23, 2,128.98 and 1,045.70

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Solution

The fourth proportional to 1,543.23, 2,128.98 and 1,045.70 is: 1,442.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.23 : 2,128.98 = 1,045.70 : x
  2. Step 2: Convert to fraction form
    1,543.23/2,128.98 = 1,045.70/x
  3. Step 3: Cross multiply
    1,543.23x = 2,128.98 × 1,045.70
  4. Step 4: Simplify right side
    1,543.23x = 2,226,263.74
  5. Step 5: Solve for x
    x = 2,226,263.74/1,543.23
  6. Step 6: Final answer
    x = 1,442.60

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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.