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Finding the Fourth Proportional to 399,011.40, 550,560.30 and 237,881.32

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Solution

The fourth proportional to 399,011.40, 550,560.30 and 237,881.32 is: 328,231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,011.40 : 550,560.30 = 237,881.32 : x
  2. Step 2: Convert to fraction form
    399,011.40/550,560.30 = 237,881.32/x
  3. Step 3: Cross multiply
    399,011.40x = 550,560.30 × 237,881.32
  4. Step 4: Simplify right side
    399,011.40x = 130,968,010,903.60
  5. Step 5: Solve for x
    x = 130,968,010,903.60/399,011.40
  6. Step 6: Final answer
    x = 328,231.25

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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.