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Finding the Fourth Proportional to 518,185.89, 776,689.20 and 315,334.60

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Solution

The fourth proportional to 518,185.89, 776,689.20 and 315,334.60 is: 472,643.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,185.89 : 776,689.20 = 315,334.60 : x
  2. Step 2: Convert to fraction form
    518,185.89/776,689.20 = 315,334.60/x
  3. Step 3: Cross multiply
    518,185.89x = 776,689.20 × 315,334.60
  4. Step 4: Simplify right side
    518,185.89x = 244,916,976,264.60
  5. Step 5: Solve for x
    x = 244,916,976,264.60/518,185.89
  6. Step 6: Final answer
    x = 472,643.08

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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.