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Finding the Fourth Proportional to 479,242.62, 661,235.94 and 315,881.02

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Solution

The fourth proportional to 479,242.62, 661,235.94 and 315,881.02 is: 435,837.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,242.62 : 661,235.94 = 315,881.02 : x
  2. Step 2: Convert to fraction form
    479,242.62/661,235.94 = 315,881.02/x
  3. Step 3: Cross multiply
    479,242.62x = 661,235.94 × 315,881.02
  4. Step 4: Simplify right side
    479,242.62x = 208,871,883,187.86
  5. Step 5: Solve for x
    x = 208,871,883,187.86/479,242.62
  6. Step 6: Final answer
    x = 435,837.45

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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.