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Finding the Fourth Proportional to 335,981.40, 502,805.70 and 307,987.80

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Solution

The fourth proportional to 335,981.40, 502,805.70 and 307,987.80 is: 460,912.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,981.40 : 502,805.70 = 307,987.80 : x
  2. Step 2: Convert to fraction form
    335,981.40/502,805.70 = 307,987.80/x
  3. Step 3: Cross multiply
    335,981.40x = 502,805.70 × 307,987.80
  4. Step 4: Simplify right side
    335,981.40x = 154,858,021,370.46
  5. Step 5: Solve for x
    x = 154,858,021,370.46/335,981.40
  6. Step 6: Final answer
    x = 460,912.48

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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.