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Finding the Fourth Proportional to 368,707.86, 508,884.12 and 215,737.20

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Solution

The fourth proportional to 368,707.86, 508,884.12 and 215,737.20 is: 297,756.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,707.86 : 508,884.12 = 215,737.20 : x
  2. Step 2: Convert to fraction form
    368,707.86/508,884.12 = 215,737.20/x
  3. Step 3: Cross multiply
    368,707.86x = 508,884.12 × 215,737.20
  4. Step 4: Simplify right side
    368,707.86x = 109,785,235,173.26
  5. Step 5: Solve for x
    x = 109,785,235,173.26/368,707.86
  6. Step 6: Final answer
    x = 297,756.70

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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.