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Finding the Fourth Proportional to 458,539.20, 687,808.80 and 299,109.60

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Solution

The fourth proportional to 458,539.20, 687,808.80 and 299,109.60 is: 448,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,539.20 : 687,808.80 = 299,109.60 : x
  2. Step 2: Convert to fraction form
    458,539.20/687,808.80 = 299,109.60/x
  3. Step 3: Cross multiply
    458,539.20x = 687,808.80 × 299,109.60
  4. Step 4: Simplify right side
    458,539.20x = 205,730,215,044.48
  5. Step 5: Solve for x
    x = 205,730,215,044.48/458,539.20
  6. Step 6: Final answer
    x = 448,664.40

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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.