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Finding the Fourth Proportional to 351,953.76, 485,478.72 and 216,009.84

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Solution

The fourth proportional to 351,953.76, 485,478.72 and 216,009.84 is: 297,960.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,953.76 : 485,478.72 = 216,009.84 : x
  2. Step 2: Convert to fraction form
    351,953.76/485,478.72 = 216,009.84/x
  3. Step 3: Cross multiply
    351,953.76x = 485,478.72 × 216,009.84
  4. Step 4: Simplify right side
    351,953.76x = 104,868,180,630.61
  5. Step 5: Solve for x
    x = 104,868,180,630.61/351,953.76
  6. Step 6: Final answer
    x = 297,960.11

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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.