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Finding the Fourth Proportional to 391,378.32, 540,092.34 and 219,303.36

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Solution

The fourth proportional to 391,378.32, 540,092.34 and 219,303.36 is: 302,633.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,378.32 : 540,092.34 = 219,303.36 : x
  2. Step 2: Convert to fraction form
    391,378.32/540,092.34 = 219,303.36/x
  3. Step 3: Cross multiply
    391,378.32x = 540,092.34 × 219,303.36
  4. Step 4: Simplify right side
    391,378.32x = 118,444,064,872.26
  5. Step 5: Solve for x
    x = 118,444,064,872.26/391,378.32
  6. Step 6: Final answer
    x = 302,633.18

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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.