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Finding the Fourth Proportional to 390,433.22, 538,794.06 and 218,349.26

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Solution

The fourth proportional to 390,433.22, 538,794.06 and 218,349.26 is: 301,319.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,433.22 : 538,794.06 = 218,349.26 : x
  2. Step 2: Convert to fraction form
    390,433.22/538,794.06 = 218,349.26/x
  3. Step 3: Cross multiply
    390,433.22x = 538,794.06 × 218,349.26
  4. Step 4: Simplify right side
    390,433.22x = 117,645,284,293.40
  5. Step 5: Solve for x
    x = 117,645,284,293.40/390,433.22
  6. Step 6: Final answer
    x = 301,319.86

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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.