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Finding the Fourth Proportional to 382,990.47, 528,494.18 and 213,240.39

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Solution

The fourth proportional to 382,990.47, 528,494.18 and 213,240.39 is: 294,253.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,990.47 : 528,494.18 = 213,240.39 : x
  2. Step 2: Convert to fraction form
    382,990.47/528,494.18 = 213,240.39/x
  3. Step 3: Cross multiply
    382,990.47x = 528,494.18 × 213,240.39
  4. Step 4: Simplify right side
    382,990.47x = 112,696,305,055.93
  5. Step 5: Solve for x
    x = 112,696,305,055.93/382,990.47
  6. Step 6: Final answer
    x = 294,253.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.