Home / 687,788.60-1,031,682.90-475,212.20

Finding the Fourth Proportional to 687,788.60, 1,031,682.90 and 475,212.20

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Solution

The fourth proportional to 687,788.60, 1,031,682.90 and 475,212.20 is: 712,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,788.60 : 1,031,682.90 = 475,212.20 : x
  2. Step 2: Convert to fraction form
    687,788.60/1,031,682.90 = 475,212.20/x
  3. Step 3: Cross multiply
    687,788.60x = 1,031,682.90 × 475,212.20
  4. Step 4: Simplify right side
    687,788.60x = 490,268,300,611.38
  5. Step 5: Solve for x
    x = 490,268,300,611.38/687,788.60
  6. Step 6: Final answer
    x = 712,818.30

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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.