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Finding the Fourth Proportional to 690,274.86, 952,578.63 and 388,475.34

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Solution

The fourth proportional to 690,274.86, 952,578.63 and 388,475.34 is: 536,095.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,274.86 : 952,578.63 = 388,475.34 : x
  2. Step 2: Convert to fraction form
    690,274.86/952,578.63 = 388,475.34/x
  3. Step 3: Cross multiply
    690,274.86x = 952,578.63 × 388,475.34
  4. Step 4: Simplify right side
    690,274.86x = 370,053,307,165.98
  5. Step 5: Solve for x
    x = 370,053,307,165.98/690,274.86
  6. Step 6: Final answer
    x = 536,095.59

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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.