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Finding the Fourth Proportional to 389,613.60, 584,420.40 and 248,608.80

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Solution

The fourth proportional to 389,613.60, 584,420.40 and 248,608.80 is: 372,913.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,613.60 : 584,420.40 = 248,608.80 : x
  2. Step 2: Convert to fraction form
    389,613.60/584,420.40 = 248,608.80/x
  3. Step 3: Cross multiply
    389,613.60x = 584,420.40 × 248,608.80
  4. Step 4: Simplify right side
    389,613.60x = 145,292,054,339.52
  5. Step 5: Solve for x
    x = 145,292,054,339.52/389,613.60
  6. Step 6: Final answer
    x = 372,913.20

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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.