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Finding the Fourth Proportional to 386,904.75, 577,215.34 and 365,978.67

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Solution

The fourth proportional to 386,904.75, 577,215.34 and 365,978.67 is: 545,996.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,904.75 : 577,215.34 = 365,978.67 : x
  2. Step 2: Convert to fraction form
    386,904.75/577,215.34 = 365,978.67/x
  3. Step 3: Cross multiply
    386,904.75x = 577,215.34 × 365,978.67
  4. Step 4: Simplify right side
    386,904.75x = 211,248,502,436.80
  5. Step 5: Solve for x
    x = 211,248,502,436.80/386,904.75
  6. Step 6: Final answer
    x = 545,996.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.