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Finding the Fourth Proportional to 261,330.90, 391,413.15 and 214,674.90

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Solution

The fourth proportional to 261,330.90, 391,413.15 and 214,674.90 is: 321,533.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,330.90 : 391,413.15 = 214,674.90 : x
  2. Step 2: Convert to fraction form
    261,330.90/391,413.15 = 214,674.90/x
  3. Step 3: Cross multiply
    261,330.90x = 391,413.15 × 214,674.90
  4. Step 4: Simplify right side
    261,330.90x = 84,026,578,834.94
  5. Step 5: Solve for x
    x = 84,026,578,834.94/261,330.90
  6. Step 6: Final answer
    x = 321,533.27

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1.5x scale

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.