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Finding the Fourth Proportional to 515,449.16, 711,319.62 and 300,547.72

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Solution

The fourth proportional to 515,449.16, 711,319.62 and 300,547.72 is: 414,755.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,449.16 : 711,319.62 = 300,547.72 : x
  2. Step 2: Convert to fraction form
    515,449.16/711,319.62 = 300,547.72/x
  3. Step 3: Cross multiply
    515,449.16x = 711,319.62 × 300,547.72
  4. Step 4: Simplify right side
    515,449.16x = 213,785,489,982.27
  5. Step 5: Solve for x
    x = 213,785,489,982.27/515,449.16
  6. Step 6: Final answer
    x = 414,755.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.