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Finding the Fourth Proportional to 217,406.40, 325,672.20 and 123,802.80

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Solution

The fourth proportional to 217,406.40, 325,672.20 and 123,802.80 is: 185,455.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,406.40 : 325,672.20 = 123,802.80 : x
  2. Step 2: Convert to fraction form
    217,406.40/325,672.20 = 123,802.80/x
  3. Step 3: Cross multiply
    217,406.40x = 325,672.20 × 123,802.80
  4. Step 4: Simplify right side
    217,406.40x = 40,319,130,242.16
  5. Step 5: Solve for x
    x = 40,319,130,242.16/217,406.40
  6. Step 6: Final answer
    x = 185,455.12

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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.