Home / 875,134.78-1,312,702.17-210,286.78

Finding the Fourth Proportional to 875,134.78, 1,312,702.17 and 210,286.78

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Solution

The fourth proportional to 875,134.78, 1,312,702.17 and 210,286.78 is: 315,430.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,134.78 : 1,312,702.17 = 210,286.78 : x
  2. Step 2: Convert to fraction form
    875,134.78/1,312,702.17 = 210,286.78/x
  3. Step 3: Cross multiply
    875,134.78x = 1,312,702.17 × 210,286.78
  4. Step 4: Simplify right side
    875,134.78x = 276,043,912,428.31
  5. Step 5: Solve for x
    x = 276,043,912,428.31/875,134.78
  6. Step 6: Final answer
    x = 315,430.17

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.