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Finding the Fourth Proportional to 547,398.15, 755,407.96 and 305,678.76

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Solution

The fourth proportional to 547,398.15, 755,407.96 and 305,678.76 is: 421,835.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,398.15 : 755,407.96 = 305,678.76 : x
  2. Step 2: Convert to fraction form
    547,398.15/755,407.96 = 305,678.76/x
  3. Step 3: Cross multiply
    547,398.15x = 755,407.96 × 305,678.76
  4. Step 4: Simplify right side
    547,398.15x = 230,912,168,506.93
  5. Step 5: Solve for x
    x = 230,912,168,506.93/547,398.15
  6. Step 6: Final answer
    x = 421,835.86

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1.5x scale

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.