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Finding the Fourth Proportional to 280,001,486.10, 391,095,087.90 and 280,001,486.10

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Solution

The fourth proportional to 280,001,486.10, 391,095,087.90 and 280,001,486.10 is: 391,095,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,001,486.10 : 391,095,087.90 = 280,001,486.10 : x
  2. Step 2: Convert to fraction form
    280,001,486.10/391,095,087.90 = 280,001,486.10/x
  3. Step 3: Cross multiply
    280,001,486.10x = 391,095,087.90 × 280,001,486.10
  4. Step 4: Simplify right side
    280,001,486.10x = 109,507,205,818,410,128
  5. Step 5: Solve for x
    x = 109,507,205,818,410,128/280,001,486.10
  6. Step 6: Final answer
    x = 391,095,087.90

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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.