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Finding the Fourth Proportional to 690,222.80, 952,505.52 and 388,416.80

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Solution

The fourth proportional to 690,222.80, 952,505.52 and 388,416.80 is: 536,014.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,222.80 : 952,505.52 = 388,416.80 : x
  2. Step 2: Convert to fraction form
    690,222.80/952,505.52 = 388,416.80/x
  3. Step 3: Cross multiply
    690,222.80x = 952,505.52 × 388,416.80
  4. Step 4: Simplify right side
    690,222.80x = 369,969,146,060.74
  5. Step 5: Solve for x
    x = 369,969,146,060.74/690,222.80
  6. Step 6: Final answer
    x = 536,014.09

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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.