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Finding the Fourth Proportional to 391,454.66, 586,762.19 and 256,467.72

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Solution

The fourth proportional to 391,454.66, 586,762.19 and 256,467.72 is: 384,426.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,454.66 : 586,762.19 = 256,467.72 : x
  2. Step 2: Convert to fraction form
    391,454.66/586,762.19 = 256,467.72/x
  3. Step 3: Cross multiply
    391,454.66x = 586,762.19 × 256,467.72
  4. Step 4: Simplify right side
    391,454.66x = 150,485,563,704.51
  5. Step 5: Solve for x
    x = 150,485,563,704.51/391,454.66
  6. Step 6: Final answer
    x = 384,426.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.