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Finding the Fourth Proportional to 869,404.80, 1,214,678.40 and 869,404.80

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Solution

The fourth proportional to 869,404.80, 1,214,678.40 and 869,404.80 is: 1,214,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,404.80 : 1,214,678.40 = 869,404.80 : x
  2. Step 2: Convert to fraction form
    869,404.80/1,214,678.40 = 869,404.80/x
  3. Step 3: Cross multiply
    869,404.80x = 1,214,678.40 × 869,404.80
  4. Step 4: Simplify right side
    869,404.80x = 1,056,047,231,416.32
  5. Step 5: Solve for x
    x = 1,056,047,231,416.32/869,404.80
  6. Step 6: Final answer
    x = 1,214,678.40

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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.