Home / 1,543.18-2,128.80-1,045.84

Finding the Fourth Proportional to 1,543.18, 2,128.80 and 1,045.84

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Solution

The fourth proportional to 1,543.18, 2,128.80 and 1,045.84 is: 1,442.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.18 : 2,128.80 = 1,045.84 : x
  2. Step 2: Convert to fraction form
    1,543.18/2,128.80 = 1,045.84/x
  3. Step 3: Cross multiply
    1,543.18x = 2,128.80 × 1,045.84
  4. Step 4: Simplify right side
    1,543.18x = 2,226,384.19
  5. Step 5: Solve for x
    x = 2,226,384.19/1,543.18
  6. Step 6: Final answer
    x = 1,442.72

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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.