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Finding the Fourth Proportional to 518,428.64, 777,569.15 and 163,396.53

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Solution

The fourth proportional to 518,428.64, 777,569.15 and 163,396.53 is: 245,071.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,428.64 : 777,569.15 = 163,396.53 : x
  2. Step 2: Convert to fraction form
    518,428.64/777,569.15 = 163,396.53/x
  3. Step 3: Cross multiply
    518,428.64x = 777,569.15 × 163,396.53
  4. Step 4: Simplify right side
    518,428.64x = 127,052,101,353.54
  5. Step 5: Solve for x
    x = 127,052,101,353.54/518,428.64
  6. Step 6: Final answer
    x = 245,071.53

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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.