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Finding the Fourth Proportional to 353,530.60, 528,999.90 and 260,218.60

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Solution

The fourth proportional to 353,530.60, 528,999.90 and 260,218.60 is: 389,373.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,530.60 : 528,999.90 = 260,218.60 : x
  2. Step 2: Convert to fraction form
    353,530.60/528,999.90 = 260,218.60/x
  3. Step 3: Cross multiply
    353,530.60x = 528,999.90 × 260,218.60
  4. Step 4: Simplify right side
    353,530.60x = 137,655,613,378.14
  5. Step 5: Solve for x
    x = 137,655,613,378.14/353,530.60
  6. Step 6: Final answer
    x = 389,373.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.