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Finding the Fourth Proportional to 391,473.44, 540,271.27 and 219,420.63

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Solution

The fourth proportional to 391,473.44, 540,271.27 and 219,420.63 is: 302,821.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,473.44 : 540,271.27 = 219,420.63 : x
  2. Step 2: Convert to fraction form
    391,473.44/540,271.27 = 219,420.63/x
  3. Step 3: Cross multiply
    391,473.44x = 540,271.27 × 219,420.63
  4. Step 4: Simplify right side
    391,473.44x = 118,546,661,474.34
  5. Step 5: Solve for x
    x = 118,546,661,474.34/391,473.44
  6. Step 6: Final answer
    x = 302,821.72

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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.