Home / 391,440.48-540,200.58-221,670.96

Finding the Fourth Proportional to 391,440.48, 540,200.58 and 221,670.96

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Solution

The fourth proportional to 391,440.48, 540,200.58 and 221,670.96 is: 305,913.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,440.48 : 540,200.58 = 221,670.96 : x
  2. Step 2: Convert to fraction form
    391,440.48/540,200.58 = 221,670.96/x
  3. Step 3: Cross multiply
    391,440.48x = 540,200.58 × 221,670.96
  4. Step 4: Simplify right side
    391,440.48x = 119,746,781,161.16
  5. Step 5: Solve for x
    x = 119,746,781,161.16/391,440.48
  6. Step 6: Final answer
    x = 305,913.13

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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.