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Finding the Fourth Proportional to 458,975.76, 686,989.44 and 245,209.20

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Solution

The fourth proportional to 458,975.76, 686,989.44 and 245,209.20 is: 367,026.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,975.76 : 686,989.44 = 245,209.20 : x
  2. Step 2: Convert to fraction form
    458,975.76/686,989.44 = 245,209.20/x
  3. Step 3: Cross multiply
    458,975.76x = 686,989.44 × 245,209.20
  4. Step 4: Simplify right side
    458,975.76x = 168,456,130,990.85
  5. Step 5: Solve for x
    x = 168,456,130,990.85/458,975.76
  6. Step 6: Final answer
    x = 367,026.20

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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.