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Finding the Fourth Proportional to 353,840.10, 488,921.13 and 282,806.34

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Solution

The fourth proportional to 353,840.10, 488,921.13 and 282,806.34 is: 390,769.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,840.10 : 488,921.13 = 282,806.34 : x
  2. Step 2: Convert to fraction form
    353,840.10/488,921.13 = 282,806.34/x
  3. Step 3: Cross multiply
    353,840.10x = 488,921.13 × 282,806.34
  4. Step 4: Simplify right side
    353,840.10x = 138,269,995,323.96
  5. Step 5: Solve for x
    x = 138,269,995,323.96/353,840.10
  6. Step 6: Final answer
    x = 390,769.72

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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.