Home / 678,657.40-1,016,430.90-663,105.40

Finding the Fourth Proportional to 678,657.40, 1,016,430.90 and 663,105.40

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Solution

The fourth proportional to 678,657.40, 1,016,430.90 and 663,105.40 is: 993,138.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,657.40 : 1,016,430.90 = 663,105.40 : x
  2. Step 2: Convert to fraction form
    678,657.40/1,016,430.90 = 663,105.40/x
  3. Step 3: Cross multiply
    678,657.40x = 1,016,430.90 × 663,105.40
  4. Step 4: Simplify right side
    678,657.40x = 674,000,818,516.86
  5. Step 5: Solve for x
    x = 674,000,818,516.86/678,657.40
  6. Step 6: Final answer
    x = 993,138.54

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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.