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Finding the Fourth Proportional to 398,395.63, 549,772.01 and 217,103.86

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Solution

The fourth proportional to 398,395.63, 549,772.01 and 217,103.86 is: 299,595.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,395.63 : 549,772.01 = 217,103.86 : x
  2. Step 2: Convert to fraction form
    398,395.63/549,772.01 = 217,103.86/x
  3. Step 3: Cross multiply
    398,395.63x = 549,772.01 × 217,103.86
  4. Step 4: Simplify right side
    398,395.63x = 119,357,624,405.44
  5. Step 5: Solve for x
    x = 119,357,624,405.44/398,395.63
  6. Step 6: Final answer
    x = 299,595.72

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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.