Home / 687,455.70-1,031,181.72-387,800.25

Finding the Fourth Proportional to 687,455.70, 1,031,181.72 and 387,800.25

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Solution

The fourth proportional to 687,455.70, 1,031,181.72 and 387,800.25 is: 581,699.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,455.70 : 1,031,181.72 = 387,800.25 : x
  2. Step 2: Convert to fraction form
    687,455.70/1,031,181.72 = 387,800.25/x
  3. Step 3: Cross multiply
    687,455.70x = 1,031,181.72 × 387,800.25
  4. Step 4: Simplify right side
    687,455.70x = 399,892,528,811.43
  5. Step 5: Solve for x
    x = 399,892,528,811.43/687,455.70
  6. Step 6: Final answer
    x = 581,699.34

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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.