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Finding the Fourth Proportional to 424,809.95, 637,216.59 and 172,095.21

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Solution

The fourth proportional to 424,809.95, 637,216.59 and 172,095.21 is: 258,143.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,809.95 : 637,216.59 = 172,095.21 : x
  2. Step 2: Convert to fraction form
    424,809.95/637,216.59 = 172,095.21/x
  3. Step 3: Cross multiply
    424,809.95x = 637,216.59 × 172,095.21
  4. Step 4: Simplify right side
    424,809.95x = 109,661,922,871.53
  5. Step 5: Solve for x
    x = 109,661,922,871.53/424,809.95
  6. Step 6: Final answer
    x = 258,143.49

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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.