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Finding the Fourth Proportional to 216,485.20, 324,071.70 and 157,436.20

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Solution

The fourth proportional to 216,485.20, 324,071.70 and 157,436.20 is: 235,677.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,485.20 : 324,071.70 = 157,436.20 : x
  2. Step 2: Convert to fraction form
    216,485.20/324,071.70 = 157,436.20/x
  3. Step 3: Cross multiply
    216,485.20x = 324,071.70 × 157,436.20
  4. Step 4: Simplify right side
    216,485.20x = 51,020,616,975.54
  5. Step 5: Solve for x
    x = 51,020,616,975.54/216,485.20
  6. Step 6: Final answer
    x = 235,677.16

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1.5x scale

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.