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Finding the Fourth Proportional to 985,658.10, 1,382,720.70 and 985,658.10

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Solution

The fourth proportional to 985,658.10, 1,382,720.70 and 985,658.10 is: 1,382,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,658.10 : 1,382,720.70 = 985,658.10 : x
  2. Step 2: Convert to fraction form
    985,658.10/1,382,720.70 = 985,658.10/x
  3. Step 3: Cross multiply
    985,658.10x = 1,382,720.70 × 985,658.10
  4. Step 4: Simplify right side
    985,658.10x = 1,362,889,857,992.67
  5. Step 5: Solve for x
    x = 1,362,889,857,992.67/985,658.10
  6. Step 6: Final answer
    x = 1,382,720.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.