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Finding the Fourth Proportional to 690,274.80, 952,577.28 and 388,468.80

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Solution

The fourth proportional to 690,274.80, 952,577.28 and 388,468.80 is: 536,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,274.80 : 952,577.28 = 388,468.80 : x
  2. Step 2: Convert to fraction form
    690,274.80/952,577.28 = 388,468.80/x
  3. Step 3: Cross multiply
    690,274.80x = 952,577.28 × 388,468.80
  4. Step 4: Simplify right side
    690,274.80x = 370,046,552,868.86
  5. Step 5: Solve for x
    x = 370,046,552,868.86/690,274.80
  6. Step 6: Final answer
    x = 536,085.85

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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.