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Finding the Fourth Proportional to 458,808.60, 687,556.80 and 318,403.20

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Solution

The fourth proportional to 458,808.60, 687,556.80 and 318,403.20 is: 477,149.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,808.60 : 687,556.80 = 318,403.20 : x
  2. Step 2: Convert to fraction form
    458,808.60/687,556.80 = 318,403.20/x
  3. Step 3: Cross multiply
    458,808.60x = 687,556.80 × 318,403.20
  4. Step 4: Simplify right side
    458,808.60x = 218,920,285,301.76
  5. Step 5: Solve for x
    x = 218,920,285,301.76/458,808.60
  6. Step 6: Final answer
    x = 477,149.48

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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.