Home / 442,872,870.40-664,309,305.60-212,786,473.60

Finding the Fourth Proportional to 442,872,870.40, 664,309,305.60 and 212,786,473.60

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Solution

The fourth proportional to 442,872,870.40, 664,309,305.60 and 212,786,473.60 is: 319,179,710.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,872,870.40 : 664,309,305.60 = 212,786,473.60 : x
  2. Step 2: Convert to fraction form
    442,872,870.40/664,309,305.60 = 212,786,473.60/x
  3. Step 3: Cross multiply
    442,872,870.40x = 664,309,305.60 × 212,786,473.60
  4. Step 4: Simplify right side
    442,872,870.40x = 141,356,034,518,288,736
  5. Step 5: Solve for x
    x = 141,356,034,518,288,736/442,872,870.40
  6. Step 6: Final answer
    x = 319,179,710.40

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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.