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Finding the Fourth Proportional to 1,543.34, 2,128.95 and 953.46

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Solution

The fourth proportional to 1,543.34, 2,128.95 and 953.46 is: 1,315.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.34 : 2,128.95 = 953.46 : x
  2. Step 2: Convert to fraction form
    1,543.34/2,128.95 = 953.46/x
  3. Step 3: Cross multiply
    1,543.34x = 2,128.95 × 953.46
  4. Step 4: Simplify right side
    1,543.34x = 2,029,868.67
  5. Step 5: Solve for x
    x = 2,029,868.67/1,543.34
  6. Step 6: Final answer
    x = 1,315.24

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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.