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Finding the Fourth Proportional to 518,422.40, 777,979.20 and 237,795.20

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Solution

The fourth proportional to 518,422.40, 777,979.20 and 237,795.20 is: 356,851.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,422.40 : 777,979.20 = 237,795.20 : x
  2. Step 2: Convert to fraction form
    518,422.40/777,979.20 = 237,795.20/x
  3. Step 3: Cross multiply
    518,422.40x = 777,979.20 × 237,795.20
  4. Step 4: Simplify right side
    518,422.40x = 184,999,719,459.84
  5. Step 5: Solve for x
    x = 184,999,719,459.84/518,422.40
  6. Step 6: Final answer
    x = 356,851.32

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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.