Home / 687,145.70-1,030,718.55-288,236.90

Finding the Fourth Proportional to 687,145.70, 1,030,718.55 and 288,236.90

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Solution

The fourth proportional to 687,145.70, 1,030,718.55 and 288,236.90 is: 432,355.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,145.70 : 1,030,718.55 = 288,236.90 : x
  2. Step 2: Convert to fraction form
    687,145.70/1,030,718.55 = 288,236.90/x
  3. Step 3: Cross multiply
    687,145.70x = 1,030,718.55 × 288,236.90
  4. Step 4: Simplify right side
    687,145.70x = 297,091,119,624.50
  5. Step 5: Solve for x
    x = 297,091,119,624.50/687,145.70
  6. Step 6: Final answer
    x = 432,355.35

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Double scale
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Similar ratio
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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.