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Finding the Fourth Proportional to 397,712.58, 548,854.88 and 216,436.20

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Solution

The fourth proportional to 397,712.58, 548,854.88 and 216,436.20 is: 298,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,712.58 : 548,854.88 = 216,436.20 : x
  2. Step 2: Convert to fraction form
    397,712.58/548,854.88 = 216,436.20/x
  3. Step 3: Cross multiply
    397,712.58x = 548,854.88 × 216,436.20
  4. Step 4: Simplify right side
    397,712.58x = 118,792,064,578.66
  5. Step 5: Solve for x
    x = 118,792,064,578.66/397,712.58
  6. Step 6: Final answer
    x = 298,688.22

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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.