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Finding the Fourth Proportional to 620,102, 855,688.38 and 375,178.01

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Solution

The fourth proportional to 620,102, 855,688.38 and 375,178.01 is: 517,713.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,102 : 855,688.38 = 375,178.01 : x
  2. Step 2: Convert to fraction form
    620,102/855,688.38 = 375,178.01/x
  3. Step 3: Cross multiply
    620,102x = 855,688.38 × 375,178.01
  4. Step 4: Simplify right side
    620,102x = 321,035,463,588.52
  5. Step 5: Solve for x
    x = 321,035,463,588.52/620,102
  6. Step 6: Final answer
    x = 517,713.96

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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.