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Finding the Fourth Proportional to 280,052,871.60, 420,079,307.40 and 280,052,871.60

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Solution

The fourth proportional to 280,052,871.60, 420,079,307.40 and 280,052,871.60 is: 420,079,307.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,052,871.60 : 420,079,307.40 = 280,052,871.60 : x
  2. Step 2: Convert to fraction form
    280,052,871.60/420,079,307.40 = 280,052,871.60/x
  3. Step 3: Cross multiply
    280,052,871.60x = 420,079,307.40 × 280,052,871.60
  4. Step 4: Simplify right side
    280,052,871.60x = 117,644,416,337,109,136
  5. Step 5: Solve for x
    x = 117,644,416,337,109,136/280,052,871.60
  6. Step 6: Final answer
    x = 420,079,307.40

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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.