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Finding the Fourth Proportional to 515,643.45, 773,485.91 and 245,632.79

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Solution

The fourth proportional to 515,643.45, 773,485.91 and 245,632.79 is: 368,459.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,643.45 : 773,485.91 = 245,632.79 : x
  2. Step 2: Convert to fraction form
    515,643.45/773,485.91 = 245,632.79/x
  3. Step 3: Cross multiply
    515,643.45x = 773,485.91 × 245,632.79
  4. Step 4: Simplify right side
    515,643.45x = 189,993,502,098.99
  5. Step 5: Solve for x
    x = 189,993,502,098.99/515,643.45
  6. Step 6: Final answer
    x = 368,459.06

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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.