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Finding the Fourth Proportional to 627,315.88, 865,713.54 and 369,211

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Solution

The fourth proportional to 627,315.88, 865,713.54 and 369,211 is: 509,521.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,315.88 : 865,713.54 = 369,211 : x
  2. Step 2: Convert to fraction form
    627,315.88/865,713.54 = 369,211/x
  3. Step 3: Cross multiply
    627,315.88x = 865,713.54 × 369,211
  4. Step 4: Simplify right side
    627,315.88x = 319,630,961,816.94
  5. Step 5: Solve for x
    x = 319,630,961,816.94/627,315.88
  6. Step 6: Final answer
    x = 509,521.55

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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.