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Finding the Fourth Proportional to 389,625.60, 584,316.90 and 153,040.80

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Solution

The fourth proportional to 389,625.60, 584,316.90 and 153,040.80 is: 229,513.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,625.60 : 584,316.90 = 153,040.80 : x
  2. Step 2: Convert to fraction form
    389,625.60/584,316.90 = 153,040.80/x
  3. Step 3: Cross multiply
    389,625.60x = 584,316.90 × 153,040.80
  4. Step 4: Simplify right side
    389,625.60x = 89,424,325,829.52
  5. Step 5: Solve for x
    x = 89,424,325,829.52/389,625.60
  6. Step 6: Final answer
    x = 229,513.48

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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.