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Finding the Fourth Proportional to 398,925.64, 550,516.18 and 217,636.26

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Solution

The fourth proportional to 398,925.64, 550,516.18 and 217,636.26 is: 300,337.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,925.64 : 550,516.18 = 217,636.26 : x
  2. Step 2: Convert to fraction form
    398,925.64/550,516.18 = 217,636.26/x
  3. Step 3: Cross multiply
    398,925.64x = 550,516.18 × 217,636.26
  4. Step 4: Simplify right side
    398,925.64x = 119,812,282,484.69
  5. Step 5: Solve for x
    x = 119,812,282,484.69/398,925.64
  6. Step 6: Final answer
    x = 300,337.38

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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.