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Finding the Fourth Proportional to 388,081.80, 535,264.20 and 342,679.68

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Solution

The fourth proportional to 388,081.80, 535,264.20 and 342,679.68 is: 472,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,081.80 : 535,264.20 = 342,679.68 : x
  2. Step 2: Convert to fraction form
    388,081.80/535,264.20 = 342,679.68/x
  3. Step 3: Cross multiply
    388,081.80x = 535,264.20 × 342,679.68
  4. Step 4: Simplify right side
    388,081.80x = 183,424,164,771.46
  5. Step 5: Solve for x
    x = 183,424,164,771.46/388,081.80
  6. Step 6: Final answer
    x = 472,643.05

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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.