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Finding the Fourth Proportional to 663,095, 915,071.10 and 361,289

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Solution

The fourth proportional to 663,095, 915,071.10 and 361,289 is: 498,578.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,095 : 915,071.10 = 361,289 : x
  2. Step 2: Convert to fraction form
    663,095/915,071.10 = 361,289/x
  3. Step 3: Cross multiply
    663,095x = 915,071.10 × 361,289
  4. Step 4: Simplify right side
    663,095x = 330,605,122,647.90
  5. Step 5: Solve for x
    x = 330,605,122,647.90/663,095
  6. Step 6: Final answer
    x = 498,578.82

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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.