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Finding the Fourth Proportional to 307,528.81, 424,389.95 and 171,562.76

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Solution

The fourth proportional to 307,528.81, 424,389.95 and 171,562.76 is: 236,756.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,528.81 : 424,389.95 = 171,562.76 : x
  2. Step 2: Convert to fraction form
    307,528.81/424,389.95 = 171,562.76/x
  3. Step 3: Cross multiply
    307,528.81x = 424,389.95 × 171,562.76
  4. Step 4: Simplify right side
    307,528.81x = 72,809,511,138.26
  5. Step 5: Solve for x
    x = 72,809,511,138.26/307,528.81
  6. Step 6: Final answer
    x = 236,756.72

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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.