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Finding the Fourth Proportional to 287,891.58, 431,913.95 and 98,351.67

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Solution

The fourth proportional to 287,891.58, 431,913.95 and 98,351.67 is: 147,553.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,891.58 : 431,913.95 = 98,351.67 : x
  2. Step 2: Convert to fraction form
    287,891.58/431,913.95 = 98,351.67/x
  3. Step 3: Cross multiply
    287,891.58x = 431,913.95 × 98,351.67
  4. Step 4: Simplify right side
    287,891.58x = 42,479,457,787.04
  5. Step 5: Solve for x
    x = 42,479,457,787.04/287,891.58
  6. Step 6: Final answer
    x = 147,553.67

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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.