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Finding the Fourth Proportional to 550,671.88, 760,143.27 and 390,364.78

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Solution

The fourth proportional to 550,671.88, 760,143.27 and 390,364.78 is: 538,856.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,671.88 : 760,143.27 = 390,364.78 : x
  2. Step 2: Convert to fraction form
    550,671.88/760,143.27 = 390,364.78/x
  3. Step 3: Cross multiply
    550,671.88x = 760,143.27 × 390,364.78
  4. Step 4: Simplify right side
    550,671.88x = 296,733,160,362.03
  5. Step 5: Solve for x
    x = 296,733,160,362.03/550,671.88
  6. Step 6: Final answer
    x = 538,856.57

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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.