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Finding the Fourth Proportional to 489,391,427.60, 734,488,674.60 and 485,565,052.40

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Solution

The fourth proportional to 489,391,427.60, 734,488,674.60 and 485,565,052.40 is: 728,745,972.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,391,427.60 : 734,488,674.60 = 485,565,052.40 : x
  2. Step 2: Convert to fraction form
    489,391,427.60/734,488,674.60 = 485,565,052.40/x
  3. Step 3: Cross multiply
    489,391,427.60x = 734,488,674.60 × 485,565,052.40
  4. Step 4: Simplify right side
    489,391,427.60x = 356,642,031,769,355,520
  5. Step 5: Solve for x
    x = 356,642,031,769,355,520/489,391,427.60
  6. Step 6: Final answer
    x = 728,745,972.36

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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.