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Finding the Fourth Proportional to 518,442.80, 777,664.20 and 305,866.40

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Solution

The fourth proportional to 518,442.80, 777,664.20 and 305,866.40 is: 458,799.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,442.80 : 777,664.20 = 305,866.40 : x
  2. Step 2: Convert to fraction form
    518,442.80/777,664.20 = 305,866.40/x
  3. Step 3: Cross multiply
    518,442.80x = 777,664.20 × 305,866.40
  4. Step 4: Simplify right side
    518,442.80x = 237,861,349,262.88
  5. Step 5: Solve for x
    x = 237,861,349,262.88/518,442.80
  6. Step 6: Final answer
    x = 458,799.60

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1.5x scale

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.