Home / 690,714.95-1,036,212.55-217,290.20

Finding the Fourth Proportional to 690,714.95, 1,036,212.55 and 217,290.20

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Solution

The fourth proportional to 690,714.95, 1,036,212.55 and 217,290.20 is: 325,979.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,714.95 : 1,036,212.55 = 217,290.20 : x
  2. Step 2: Convert to fraction form
    690,714.95/1,036,212.55 = 217,290.20/x
  3. Step 3: Cross multiply
    690,714.95x = 1,036,212.55 × 217,290.20
  4. Step 4: Simplify right side
    690,714.95x = 225,158,826,507.72
  5. Step 5: Solve for x
    x = 225,158,826,507.72/690,714.95
  6. Step 6: Final answer
    x = 325,979.38

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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.