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Finding the Fourth Proportional to 389,887.56, 583,500.69 and 326,778.95

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Solution

The fourth proportional to 389,887.56, 583,500.69 and 326,778.95 is: 489,053.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,887.56 : 583,500.69 = 326,778.95 : x
  2. Step 2: Convert to fraction form
    389,887.56/583,500.69 = 326,778.95/x
  3. Step 3: Cross multiply
    389,887.56x = 583,500.69 × 326,778.95
  4. Step 4: Simplify right side
    389,887.56x = 190,675,742,802.48
  5. Step 5: Solve for x
    x = 190,675,742,802.48/389,887.56
  6. Step 6: Final answer
    x = 489,053.16

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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.