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Finding the Fourth Proportional to 391,707.38, 540,721.53 and 264,555.20

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Solution

The fourth proportional to 391,707.38, 540,721.53 and 264,555.20 is: 365,197.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,707.38 : 540,721.53 = 264,555.20 : x
  2. Step 2: Convert to fraction form
    391,707.38/540,721.53 = 264,555.20/x
  3. Step 3: Cross multiply
    391,707.38x = 540,721.53 × 264,555.20
  4. Step 4: Simplify right side
    391,707.38x = 143,050,692,513.46
  5. Step 5: Solve for x
    x = 143,050,692,513.46/391,707.38
  6. Step 6: Final answer
    x = 365,197.85

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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.