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Finding the Fourth Proportional to 571,978.95, 857,990.70 and 172,619.79

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Solution

The fourth proportional to 571,978.95, 857,990.70 and 172,619.79 is: 258,936.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,978.95 : 857,990.70 = 172,619.79 : x
  2. Step 2: Convert to fraction form
    571,978.95/857,990.70 = 172,619.79/x
  3. Step 3: Cross multiply
    571,978.95x = 857,990.70 × 172,619.79
  4. Step 4: Simplify right side
    571,978.95x = 148,106,174,455.95
  5. Step 5: Solve for x
    x = 148,106,174,455.95/571,978.95
  6. Step 6: Final answer
    x = 258,936.41

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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.