Home / 391,312.08-540,010.92-221,546.40

Finding the Fourth Proportional to 391,312.08, 540,010.92 and 221,546.40

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Solution

The fourth proportional to 391,312.08, 540,010.92 and 221,546.40 is: 305,734.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,312.08 : 540,010.92 = 221,546.40 : x
  2. Step 2: Convert to fraction form
    391,312.08/540,010.92 = 221,546.40/x
  3. Step 3: Cross multiply
    391,312.08x = 540,010.92 × 221,546.40
  4. Step 4: Simplify right side
    391,312.08x = 119,637,475,286.69
  5. Step 5: Solve for x
    x = 119,637,475,286.69/391,312.08
  6. Step 6: Final answer
    x = 305,734.17

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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.