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Finding the Fourth Proportional to 518,615.30, 778,032.30 and 163,665.20

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Solution

The fourth proportional to 518,615.30, 778,032.30 and 163,665.20 is: 245,532.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,615.30 : 778,032.30 = 163,665.20 : x
  2. Step 2: Convert to fraction form
    518,615.30/778,032.30 = 163,665.20/x
  3. Step 3: Cross multiply
    518,615.30x = 778,032.30 × 163,665.20
  4. Step 4: Simplify right side
    518,615.30x = 127,336,811,985.96
  5. Step 5: Solve for x
    x = 127,336,811,985.96/518,615.30
  6. Step 6: Final answer
    x = 245,532.31

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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.