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Finding the Fourth Proportional to 557,521.69, 769,318.22 and 309,157.39

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Solution

The fourth proportional to 557,521.69, 769,318.22 and 309,157.39 is: 426,602.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,521.69 : 769,318.22 = 309,157.39 : x
  2. Step 2: Convert to fraction form
    557,521.69/769,318.22 = 309,157.39/x
  3. Step 3: Cross multiply
    557,521.69x = 769,318.22 × 309,157.39
  4. Step 4: Simplify right side
    557,521.69x = 237,840,412,974.65
  5. Step 5: Solve for x
    x = 237,840,412,974.65/557,521.69
  6. Step 6: Final answer
    x = 426,602.98

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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.