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Finding the Fourth Proportional to 315,456.94, 435,328.36 and 172,216.99

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Solution

The fourth proportional to 315,456.94, 435,328.36 and 172,216.99 is: 237,658.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,456.94 : 435,328.36 = 172,216.99 : x
  2. Step 2: Convert to fraction form
    315,456.94/435,328.36 = 172,216.99/x
  3. Step 3: Cross multiply
    315,456.94x = 435,328.36 × 172,216.99
  4. Step 4: Simplify right side
    315,456.94x = 74,970,939,820.84
  5. Step 5: Solve for x
    x = 74,970,939,820.84/315,456.94
  6. Step 6: Final answer
    x = 237,658.24

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1.5x scale

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.