Home / 442,839,818.40-664,259,727.60-212,753,421.60

Finding the Fourth Proportional to 442,839,818.40, 664,259,727.60 and 212,753,421.60

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Solution

The fourth proportional to 442,839,818.40, 664,259,727.60 and 212,753,421.60 is: 319,130,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,839,818.40 : 664,259,727.60 = 212,753,421.60 : x
  2. Step 2: Convert to fraction form
    442,839,818.40/664,259,727.60 = 212,753,421.60/x
  3. Step 3: Cross multiply
    442,839,818.40x = 664,259,727.60 × 212,753,421.60
  4. Step 4: Simplify right side
    442,839,818.40x = 141,323,529,877,983,952
  5. Step 5: Solve for x
    x = 141,323,529,877,983,952/442,839,818.40
  6. Step 6: Final answer
    x = 319,130,132.40

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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.