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Finding the Fourth Proportional to 258,985,891.40, 388,478,837.10 and 258,985,891.40

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Solution

The fourth proportional to 258,985,891.40, 388,478,837.10 and 258,985,891.40 is: 388,478,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,985,891.40 : 388,478,837.10 = 258,985,891.40 : x
  2. Step 2: Convert to fraction form
    258,985,891.40/388,478,837.10 = 258,985,891.40/x
  3. Step 3: Cross multiply
    258,985,891.40x = 388,478,837.10 × 258,985,891.40
  4. Step 4: Simplify right side
    258,985,891.40x = 100,610,537,916,378,896
  5. Step 5: Solve for x
    x = 100,610,537,916,378,896/258,985,891.40
  6. Step 6: Final answer
    x = 388,478,837.10

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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.