Home / 386,001,009.90-578,861,352.45-211,253,192.64

Finding the Fourth Proportional to 386,001,009.90, 578,861,352.45 and 211,253,192.64

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Solution

The fourth proportional to 386,001,009.90, 578,861,352.45 and 211,253,192.64 is: 316,803,079.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,001,009.90 : 578,861,352.45 = 211,253,192.64 : x
  2. Step 2: Convert to fraction form
    386,001,009.90/578,861,352.45 = 211,253,192.64/x
  3. Step 3: Cross multiply
    386,001,009.90x = 578,861,352.45 × 211,253,192.64
  4. Step 4: Simplify right side
    386,001,009.90x = 122,286,308,800,970,784
  5. Step 5: Solve for x
    x = 122,286,308,800,970,784/386,001,009.90
  6. Step 6: Final answer
    x = 316,803,079.95

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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.