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Finding the Fourth Proportional to 438,165.36, 604,289.66 and 285,148.48

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Solution

The fourth proportional to 438,165.36, 604,289.66 and 285,148.48 is: 393,258.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,165.36 : 604,289.66 = 285,148.48 : x
  2. Step 2: Convert to fraction form
    438,165.36/604,289.66 = 285,148.48/x
  3. Step 3: Cross multiply
    438,165.36x = 604,289.66 × 285,148.48
  4. Step 4: Simplify right side
    438,165.36x = 172,312,278,028.72
  5. Step 5: Solve for x
    x = 172,312,278,028.72/438,165.36
  6. Step 6: Final answer
    x = 393,258.56

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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.