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Finding the Fourth Proportional to 399,008.40, 550,556.16 and 237,878.32

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Solution

The fourth proportional to 399,008.40, 550,556.16 and 237,878.32 is: 328,227.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,008.40 : 550,556.16 = 237,878.32 : x
  2. Step 2: Convert to fraction form
    399,008.40/550,556.16 = 237,878.32/x
  3. Step 3: Cross multiply
    399,008.40x = 550,556.16 × 237,878.32
  4. Step 4: Simplify right side
    399,008.40x = 130,965,374,406.45
  5. Step 5: Solve for x
    x = 130,965,374,406.45/399,008.40
  6. Step 6: Final answer
    x = 328,227.11

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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.