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Finding the Fourth Proportional to 486,153.60, 679,040.40 and 486,153.60

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Solution

The fourth proportional to 486,153.60, 679,040.40 and 486,153.60 is: 679,040.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,153.60 : 679,040.40 = 486,153.60 : x
  2. Step 2: Convert to fraction form
    486,153.60/679,040.40 = 486,153.60/x
  3. Step 3: Cross multiply
    486,153.60x = 679,040.40 × 486,153.60
  4. Step 4: Simplify right side
    486,153.60x = 330,117,935,005.44
  5. Step 5: Solve for x
    x = 330,117,935,005.44/486,153.60
  6. Step 6: Final answer
    x = 679,040.40

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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.