Home / 442,872,871.40-664,309,307.10-212,786,474.60

Finding the Fourth Proportional to 442,872,871.40, 664,309,307.10 and 212,786,474.60

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Solution

The fourth proportional to 442,872,871.40, 664,309,307.10 and 212,786,474.60 is: 319,179,711.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,872,871.40 : 664,309,307.10 = 212,786,474.60 : x
  2. Step 2: Convert to fraction form
    442,872,871.40/664,309,307.10 = 212,786,474.60/x
  3. Step 3: Cross multiply
    442,872,871.40x = 664,309,307.10 × 212,786,474.60
  4. Step 4: Simplify right side
    442,872,871.40x = 141,356,035,501,777,744
  5. Step 5: Solve for x
    x = 141,356,035,501,777,744/442,872,871.40
  6. Step 6: Final answer
    x = 319,179,711.90

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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.