Home / 687,999.70-1,031,999.55-520,038.10

Finding the Fourth Proportional to 687,999.70, 1,031,999.55 and 520,038.10

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Solution

The fourth proportional to 687,999.70, 1,031,999.55 and 520,038.10 is: 780,057.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,999.70 : 1,031,999.55 = 520,038.10 : x
  2. Step 2: Convert to fraction form
    687,999.70/1,031,999.55 = 520,038.10/x
  3. Step 3: Cross multiply
    687,999.70x = 1,031,999.55 × 520,038.10
  4. Step 4: Simplify right side
    687,999.70x = 536,679,085,182.86
  5. Step 5: Solve for x
    x = 536,679,085,182.86/687,999.70
  6. Step 6: Final answer
    x = 780,057.15

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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.