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Finding the Fourth Proportional to 518,939.36, 716,136 and 280,475.36

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Solution

The fourth proportional to 518,939.36, 716,136 and 280,475.36 is: 387,055.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,939.36 : 716,136 = 280,475.36 : x
  2. Step 2: Convert to fraction form
    518,939.36/716,136 = 280,475.36/x
  3. Step 3: Cross multiply
    518,939.36x = 716,136 × 280,475.36
  4. Step 4: Simplify right side
    518,939.36x = 200,858,502,408.96
  5. Step 5: Solve for x
    x = 200,858,502,408.96/518,939.36
  6. Step 6: Final answer
    x = 387,055.83

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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.