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Finding the Fourth Proportional to 518,978.99, 778,598.09 and 144,998.75

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Solution

The fourth proportional to 518,978.99, 778,598.09 and 144,998.75 is: 217,534.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,978.99 : 778,598.09 = 144,998.75 : x
  2. Step 2: Convert to fraction form
    518,978.99/778,598.09 = 144,998.75/x
  3. Step 3: Cross multiply
    518,978.99x = 778,598.09 × 144,998.75
  4. Step 4: Simplify right side
    518,978.99x = 112,895,749,802.39
  5. Step 5: Solve for x
    x = 112,895,749,802.39/518,978.99
  6. Step 6: Final answer
    x = 217,534.34

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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.