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Finding the Fourth Proportional to 258,750.39, 388,002.67 and 90,250.25

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Solution

The fourth proportional to 258,750.39, 388,002.67 and 90,250.25 is: 135,332.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,750.39 : 388,002.67 = 90,250.25 : x
  2. Step 2: Convert to fraction form
    258,750.39/388,002.67 = 90,250.25/x
  3. Step 3: Cross multiply
    258,750.39x = 388,002.67 × 90,250.25
  4. Step 4: Simplify right side
    258,750.39x = 35,017,335,802.53
  5. Step 5: Solve for x
    x = 35,017,335,802.53/258,750.39
  6. Step 6: Final answer
    x = 135,332.49

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1.5x scale

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.