Home / 261,311.20-391,448.40-155,816.80

Finding the Fourth Proportional to 261,311.20, 391,448.40 and 155,816.80

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Solution

The fourth proportional to 261,311.20, 391,448.40 and 155,816.80 is: 233,416.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,311.20 : 391,448.40 = 155,816.80 : x
  2. Step 2: Convert to fraction form
    261,311.20/391,448.40 = 155,816.80/x
  3. Step 3: Cross multiply
    261,311.20x = 391,448.40 × 155,816.80
  4. Step 4: Simplify right side
    261,311.20x = 60,994,237,053.12
  5. Step 5: Solve for x
    x = 60,994,237,053.12/261,311.20
  6. Step 6: Final answer
    x = 233,416.08

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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.