Home / 690,679.40-1,036,019.10-217,509.80

Finding the Fourth Proportional to 690,679.40, 1,036,019.10 and 217,509.80

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Solution

The fourth proportional to 690,679.40, 1,036,019.10 and 217,509.80 is: 326,264.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,679.40 : 1,036,019.10 = 217,509.80 : x
  2. Step 2: Convert to fraction form
    690,679.40/1,036,019.10 = 217,509.80/x
  3. Step 3: Cross multiply
    690,679.40x = 1,036,019.10 × 217,509.80
  4. Step 4: Simplify right side
    690,679.40x = 225,344,307,237.18
  5. Step 5: Solve for x
    x = 225,344,307,237.18/690,679.40
  6. Step 6: Final answer
    x = 326,264.70

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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.