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Finding the Fourth Proportional to 370,411.36, 555,266.64 and 133,690.72

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Solution

The fourth proportional to 370,411.36, 555,266.64 and 133,690.72 is: 200,409.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,411.36 : 555,266.64 = 133,690.72 : x
  2. Step 2: Convert to fraction form
    370,411.36/555,266.64 = 133,690.72/x
  3. Step 3: Cross multiply
    370,411.36x = 555,266.64 × 133,690.72
  4. Step 4: Simplify right side
    370,411.36x = 74,233,996,893.58
  5. Step 5: Solve for x
    x = 74,233,996,893.58/370,411.36
  6. Step 6: Final answer
    x = 200,409.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.