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Finding the Fourth Proportional to 391,637.40, 540,418.96 and 230,482.84

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Solution

The fourth proportional to 391,637.40, 540,418.96 and 230,482.84 is: 318,042.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,637.40 : 540,418.96 = 230,482.84 : x
  2. Step 2: Convert to fraction form
    391,637.40/540,418.96 = 230,482.84/x
  3. Step 3: Cross multiply
    391,637.40x = 540,418.96 × 230,482.84
  4. Step 4: Simplify right side
    391,637.40x = 124,557,296,690.65
  5. Step 5: Solve for x
    x = 124,557,296,690.65/391,637.40
  6. Step 6: Final answer
    x = 318,042.40

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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.