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Finding the Fourth Proportional to 660,399, 911,350.62 and 358,593

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Solution

The fourth proportional to 660,399, 911,350.62 and 358,593 is: 494,858.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,399 : 911,350.62 = 358,593 : x
  2. Step 2: Convert to fraction form
    660,399/911,350.62 = 358,593/x
  3. Step 3: Cross multiply
    660,399x = 911,350.62 × 358,593
  4. Step 4: Simplify right side
    660,399x = 326,803,952,877.66
  5. Step 5: Solve for x
    x = 326,803,952,877.66/660,399
  6. Step 6: Final answer
    x = 494,858.34

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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.