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Finding the Fourth Proportional to 666,898.62, 1,000,045.35 and 287,640.12

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Solution

The fourth proportional to 666,898.62, 1,000,045.35 and 287,640.12 is: 431,329.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,898.62 : 1,000,045.35 = 287,640.12 : x
  2. Step 2: Convert to fraction form
    666,898.62/1,000,045.35 = 287,640.12/x
  3. Step 3: Cross multiply
    666,898.62x = 1,000,045.35 × 287,640.12
  4. Step 4: Simplify right side
    666,898.62x = 287,653,164,479.44
  5. Step 5: Solve for x
    x = 287,653,164,479.44/666,898.62
  6. Step 6: Final answer
    x = 431,329.67

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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.