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Finding the Fourth Proportional to 518,603.20, 776,349.60 and 308,132.80

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Solution

The fourth proportional to 518,603.20, 776,349.60 and 308,132.80 is: 461,275.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,603.20 : 776,349.60 = 308,132.80 : x
  2. Step 2: Convert to fraction form
    518,603.20/776,349.60 = 308,132.80/x
  3. Step 3: Cross multiply
    518,603.20x = 776,349.60 × 308,132.80
  4. Step 4: Simplify right side
    518,603.20x = 239,218,776,026.88
  5. Step 5: Solve for x
    x = 239,218,776,026.88/518,603.20
  6. Step 6: Final answer
    x = 461,275.16

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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.