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Finding the Fourth Proportional to 345,345.41, 518,073.48 and 145,695.21

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Solution

The fourth proportional to 345,345.41, 518,073.48 and 145,695.21 is: 218,566.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,345.41 : 518,073.48 = 145,695.21 : x
  2. Step 2: Convert to fraction form
    345,345.41/518,073.48 = 145,695.21/x
  3. Step 3: Cross multiply
    345,345.41x = 518,073.48 × 145,695.21
  4. Step 4: Simplify right side
    345,345.41x = 75,480,821,804.17
  5. Step 5: Solve for x
    x = 75,480,821,804.17/345,345.41
  6. Step 6: Final answer
    x = 218,566.16

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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.