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Finding the Fourth Proportional to 398,563.64, 550,001.58 and 217,271.60

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Solution

The fourth proportional to 398,563.64, 550,001.58 and 217,271.60 is: 299,825.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,563.64 : 550,001.58 = 217,271.60 : x
  2. Step 2: Convert to fraction form
    398,563.64/550,001.58 = 217,271.60/x
  3. Step 3: Cross multiply
    398,563.64x = 550,001.58 × 217,271.60
  4. Step 4: Simplify right side
    398,563.64x = 119,499,723,289.13
  5. Step 5: Solve for x
    x = 119,499,723,289.13/398,563.64
  6. Step 6: Final answer
    x = 299,825.95

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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.