Home / 691,139.70-1,036,709.55-292,230.90

Finding the Fourth Proportional to 691,139.70, 1,036,709.55 and 292,230.90

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Solution

The fourth proportional to 691,139.70, 1,036,709.55 and 292,230.90 is: 438,346.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,139.70 : 1,036,709.55 = 292,230.90 : x
  2. Step 2: Convert to fraction form
    691,139.70/1,036,709.55 = 292,230.90/x
  3. Step 3: Cross multiply
    691,139.70x = 1,036,709.55 × 292,230.90
  4. Step 4: Simplify right side
    691,139.70x = 302,958,564,835.10
  5. Step 5: Solve for x
    x = 302,958,564,835.10/691,139.70
  6. Step 6: Final answer
    x = 438,346.35

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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.