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Finding the Fourth Proportional to 658,243.80, 987,398.10 and 343,315.80

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Solution

The fourth proportional to 658,243.80, 987,398.10 and 343,315.80 is: 514,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,243.80 : 987,398.10 = 343,315.80 : x
  2. Step 2: Convert to fraction form
    658,243.80/987,398.10 = 343,315.80/x
  3. Step 3: Cross multiply
    658,243.80x = 987,398.10 × 343,315.80
  4. Step 4: Simplify right side
    658,243.80x = 338,989,368,619.98
  5. Step 5: Solve for x
    x = 338,989,368,619.98/658,243.80
  6. Step 6: Final answer
    x = 514,990.60

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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.