Home / 687,788.40-1,031,682.60-404,353.20

Finding the Fourth Proportional to 687,788.40, 1,031,682.60 and 404,353.20

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Solution

The fourth proportional to 687,788.40, 1,031,682.60 and 404,353.20 is: 606,529.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,788.40 : 1,031,682.60 = 404,353.20 : x
  2. Step 2: Convert to fraction form
    687,788.40/1,031,682.60 = 404,353.20/x
  3. Step 3: Cross multiply
    687,788.40x = 1,031,682.60 × 404,353.20
  4. Step 4: Simplify right side
    687,788.40x = 417,164,160,694.32
  5. Step 5: Solve for x
    x = 417,164,160,694.32/687,788.40
  6. Step 6: Final answer
    x = 606,529.80

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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.