Home / 391,417.48-540,156.09-221,684.41

Finding the Fourth Proportional to 391,417.48, 540,156.09 and 221,684.41

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Solution

The fourth proportional to 391,417.48, 540,156.09 and 221,684.41 is: 305,924.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,417.48 : 540,156.09 = 221,684.41 : x
  2. Step 2: Convert to fraction form
    391,417.48/540,156.09 = 221,684.41/x
  3. Step 3: Cross multiply
    391,417.48x = 540,156.09 × 221,684.41
  4. Step 4: Simplify right side
    391,417.48x = 119,744,184,119.56
  5. Step 5: Solve for x
    x = 119,744,184,119.56/391,417.48
  6. Step 6: Final answer
    x = 305,924.47

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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.