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Finding the Fourth Proportional to 385,620.80, 577,264.80 and 343,630.40

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Solution

The fourth proportional to 385,620.80, 577,264.80 and 343,630.40 is: 514,406.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,620.80 : 577,264.80 = 343,630.40 : x
  2. Step 2: Convert to fraction form
    385,620.80/577,264.80 = 343,630.40/x
  3. Step 3: Cross multiply
    385,620.80x = 577,264.80 × 343,630.40
  4. Step 4: Simplify right side
    385,620.80x = 198,365,734,129.92
  5. Step 5: Solve for x
    x = 198,365,734,129.92/385,620.80
  6. Step 6: Final answer
    x = 514,406.21

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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.