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Finding the Fourth Proportional to 388,219.80, 535,728.32 and 216,144.52

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Solution

The fourth proportional to 388,219.80, 535,728.32 and 216,144.52 is: 298,271.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,219.80 : 535,728.32 = 216,144.52 : x
  2. Step 2: Convert to fraction form
    388,219.80/535,728.32 = 216,144.52/x
  3. Step 3: Cross multiply
    388,219.80x = 535,728.32 × 216,144.52
  4. Step 4: Simplify right side
    388,219.80x = 115,794,740,576.81
  5. Step 5: Solve for x
    x = 115,794,740,576.81/388,219.80
  6. Step 6: Final answer
    x = 298,271.08

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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.