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Finding the Fourth Proportional to 518,722.20, 778,083.30 and 144,745.20

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Solution

The fourth proportional to 518,722.20, 778,083.30 and 144,745.20 is: 217,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,722.20 : 778,083.30 = 144,745.20 : x
  2. Step 2: Convert to fraction form
    518,722.20/778,083.30 = 144,745.20/x
  3. Step 3: Cross multiply
    518,722.20x = 778,083.30 × 144,745.20
  4. Step 4: Simplify right side
    518,722.20x = 112,623,822,875.16
  5. Step 5: Solve for x
    x = 112,623,822,875.16/518,722.20
  6. Step 6: Final answer
    x = 217,117.80

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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.