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Finding the Fourth Proportional to 1,403.18, 1,937.14 and 879.38

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Solution

The fourth proportional to 1,403.18, 1,937.14 and 879.38 is: 1,214.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.18 : 1,937.14 = 879.38 : x
  2. Step 2: Convert to fraction form
    1,403.18/1,937.14 = 879.38/x
  3. Step 3: Cross multiply
    1,403.18x = 1,937.14 × 879.38
  4. Step 4: Simplify right side
    1,403.18x = 1,703,482.17
  5. Step 5: Solve for x
    x = 1,703,482.17/1,403.18
  6. Step 6: Final answer
    x = 1,214.02

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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.