Home / 687,904,011.84-1,031,778,744.90-189,985,312.56

Finding the Fourth Proportional to 687,904,011.84, 1,031,778,744.90 and 189,985,312.56

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Solution

The fourth proportional to 687,904,011.84, 1,031,778,744.90 and 189,985,312.56 is: 284,956,627.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,904,011.84 : 1,031,778,744.90 = 189,985,312.56 : x
  2. Step 2: Convert to fraction form
    687,904,011.84/1,031,778,744.90 = 189,985,312.56/x
  3. Step 3: Cross multiply
    687,904,011.84x = 1,031,778,744.90 × 189,985,312.56
  4. Step 4: Simplify right side
    687,904,011.84x = 196,022,807,342,591,008
  5. Step 5: Solve for x
    x = 196,022,807,342,591,008/687,904,011.84
  6. Step 6: Final answer
    x = 284,956,627.62

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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.