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Finding the Fourth Proportional to 400,911.93, 553,258.69 and 219,630.42

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Solution

The fourth proportional to 400,911.93, 553,258.69 and 219,630.42 is: 303,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,911.93 : 553,258.69 = 219,630.42 : x
  2. Step 2: Convert to fraction form
    400,911.93/553,258.69 = 219,630.42/x
  3. Step 3: Cross multiply
    400,911.93x = 553,258.69 × 219,630.42
  4. Step 4: Simplify right side
    400,911.93x = 121,512,437,904.27
  5. Step 5: Solve for x
    x = 121,512,437,904.27/400,911.93
  6. Step 6: Final answer
    x = 303,090.10

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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.