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Finding the Fourth Proportional to 343,417.40, 514,980.30 and 165,978.80

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Solution

The fourth proportional to 343,417.40, 514,980.30 and 165,978.80 is: 248,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,417.40 : 514,980.30 = 165,978.80 : x
  2. Step 2: Convert to fraction form
    343,417.40/514,980.30 = 165,978.80/x
  3. Step 3: Cross multiply
    343,417.40x = 514,980.30 × 165,978.80
  4. Step 4: Simplify right side
    343,417.40x = 85,475,812,217.64
  5. Step 5: Solve for x
    x = 85,475,812,217.64/343,417.40
  6. Step 6: Final answer
    x = 248,897.73

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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.