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Finding the Fourth Proportional to 290,411.40, 435,672.36 and 100,864.56

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Solution

The fourth proportional to 290,411.40, 435,672.36 and 100,864.56 is: 151,316.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,411.40 : 435,672.36 = 100,864.56 : x
  2. Step 2: Convert to fraction form
    290,411.40/435,672.36 = 100,864.56/x
  3. Step 3: Cross multiply
    290,411.40x = 435,672.36 × 100,864.56
  4. Step 4: Simplify right side
    290,411.40x = 43,943,900,895.56
  5. Step 5: Solve for x
    x = 43,943,900,895.56/290,411.40
  6. Step 6: Final answer
    x = 151,316.03

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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.