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Finding the Fourth Proportional to 386,818.02, 533,813.76 and 217,048.50

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Solution

The fourth proportional to 386,818.02, 533,813.76 and 217,048.50 is: 299,529.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,818.02 : 533,813.76 = 217,048.50 : x
  2. Step 2: Convert to fraction form
    386,818.02/533,813.76 = 217,048.50/x
  3. Step 3: Cross multiply
    386,818.02x = 533,813.76 × 217,048.50
  4. Step 4: Simplify right side
    386,818.02x = 115,863,475,887.36
  5. Step 5: Solve for x
    x = 115,863,475,887.36/386,818.02
  6. Step 6: Final answer
    x = 299,529.68

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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.