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Finding the Fourth Proportional to 398,395.28, 549,785.59 and 217,107.23

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Solution

The fourth proportional to 398,395.28, 549,785.59 and 217,107.23 is: 299,608.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,395.28 : 549,785.59 = 217,107.23 : x
  2. Step 2: Convert to fraction form
    398,395.28/549,785.59 = 217,107.23/x
  3. Step 3: Cross multiply
    398,395.28x = 549,785.59 × 217,107.23
  4. Step 4: Simplify right side
    398,395.28x = 119,362,423,247.12
  5. Step 5: Solve for x
    x = 119,362,423,247.12/398,395.28
  6. Step 6: Final answer
    x = 299,608.02

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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.