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Finding the Fourth Proportional to 480,442.32, 663,018.48 and 279,238.32

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Solution

The fourth proportional to 480,442.32, 663,018.48 and 279,238.32 is: 385,353.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,442.32 : 663,018.48 = 279,238.32 : x
  2. Step 2: Convert to fraction form
    480,442.32/663,018.48 = 279,238.32/x
  3. Step 3: Cross multiply
    480,442.32x = 663,018.48 × 279,238.32
  4. Step 4: Simplify right side
    480,442.32x = 185,140,166,484.15
  5. Step 5: Solve for x
    x = 185,140,166,484.15/480,442.32
  6. Step 6: Final answer
    x = 385,353.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.