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Finding the Fourth Proportional to 354,755.80, 489,567.54 and 209,566.36

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Solution

The fourth proportional to 354,755.80, 489,567.54 and 209,566.36 is: 289,204.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,755.80 : 489,567.54 = 209,566.36 : x
  2. Step 2: Convert to fraction form
    354,755.80/489,567.54 = 209,566.36/x
  3. Step 3: Cross multiply
    354,755.80x = 489,567.54 × 209,566.36
  4. Step 4: Simplify right side
    354,755.80x = 102,596,887,331.95
  5. Step 5: Solve for x
    x = 102,596,887,331.95/354,755.80
  6. Step 6: Final answer
    x = 289,204.26

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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.