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Finding the Fourth Proportional to 399,312.72, 550,852.62 and 238,054.14

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Solution

The fourth proportional to 399,312.72, 550,852.62 and 238,054.14 is: 328,396.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,312.72 : 550,852.62 = 238,054.14 : x
  2. Step 2: Convert to fraction form
    399,312.72/550,852.62 = 238,054.14/x
  3. Step 3: Cross multiply
    399,312.72x = 550,852.62 × 238,054.14
  4. Step 4: Simplify right side
    399,312.72x = 131,132,746,720.85
  5. Step 5: Solve for x
    x = 131,132,746,720.85/399,312.72
  6. Step 6: Final answer
    x = 328,396.12

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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.