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Finding the Fourth Proportional to 402,652,608.72, 603,788,085.12 and 140,245,642.64

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Solution

The fourth proportional to 402,652,608.72, 603,788,085.12 and 140,245,642.64 is: 210,301,997.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,652,608.72 : 603,788,085.12 = 140,245,642.64 : x
  2. Step 2: Convert to fraction form
    402,652,608.72/603,788,085.12 = 140,245,642.64/x
  3. Step 3: Cross multiply
    402,652,608.72x = 603,788,085.12 × 140,245,642.64
  4. Step 4: Simplify right side
    402,652,608.72x = 84,678,648,016,029,408
  5. Step 5: Solve for x
    x = 84,678,648,016,029,408/402,652,608.72
  6. Step 6: Final answer
    x = 210,301,997.76

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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.