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Finding the Fourth Proportional to 438,893.70, 605,430.78 and 357,309.72

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Solution

The fourth proportional to 438,893.70, 605,430.78 and 357,309.72 is: 492,889.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,893.70 : 605,430.78 = 357,309.72 : x
  2. Step 2: Convert to fraction form
    438,893.70/605,430.78 = 357,309.72/x
  3. Step 3: Cross multiply
    438,893.70x = 605,430.78 × 357,309.72
  4. Step 4: Simplify right side
    438,893.70x = 216,326,302,481.18
  5. Step 5: Solve for x
    x = 216,326,302,481.18/438,893.70
  6. Step 6: Final answer
    x = 492,889.97

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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.