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Finding the Fourth Proportional to 317,908.68, 438,688.53 and 181,911.45

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Solution

The fourth proportional to 317,908.68, 438,688.53 and 181,911.45 is: 251,023.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,908.68 : 438,688.53 = 181,911.45 : x
  2. Step 2: Convert to fraction form
    317,908.68/438,688.53 = 181,911.45/x
  3. Step 3: Cross multiply
    317,908.68x = 438,688.53 × 181,911.45
  4. Step 4: Simplify right side
    317,908.68x = 79,802,466,590.67
  5. Step 5: Solve for x
    x = 79,802,466,590.67/317,908.68
  6. Step 6: Final answer
    x = 251,023.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.