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Finding the Fourth Proportional to 388,803.38, 583,238.48 and 108,320.63

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Solution

The fourth proportional to 388,803.38, 583,238.48 and 108,320.63 is: 162,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,803.38 : 583,238.48 = 108,320.63 : x
  2. Step 2: Convert to fraction form
    388,803.38/583,238.48 = 108,320.63/x
  3. Step 3: Cross multiply
    388,803.38x = 583,238.48 × 108,320.63
  4. Step 4: Simplify right side
    388,803.38x = 63,176,756,136.05
  5. Step 5: Solve for x
    x = 63,176,756,136.05/388,803.38
  6. Step 6: Final answer
    x = 162,490.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.