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Finding the Fourth Proportional to 391,506.91, 540,317.45 and 219,454.10

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Solution

The fourth proportional to 391,506.91, 540,317.45 and 219,454.10 is: 302,867.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,506.91 : 540,317.45 = 219,454.10 : x
  2. Step 2: Convert to fraction form
    391,506.91/540,317.45 = 219,454.10/x
  3. Step 3: Cross multiply
    391,506.91x = 540,317.45 × 219,454.10
  4. Step 4: Simplify right side
    391,506.91x = 118,574,879,577.28
  5. Step 5: Solve for x
    x = 118,574,879,577.28/391,506.91
  6. Step 6: Final answer
    x = 302,867.91

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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.