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Finding the Fourth Proportional to 493,031.34, 680,369.40 and 278,191.40

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Solution

The fourth proportional to 493,031.34, 680,369.40 and 278,191.40 is: 383,896.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,031.34 : 680,369.40 = 278,191.40 : x
  2. Step 2: Convert to fraction form
    493,031.34/680,369.40 = 278,191.40/x
  3. Step 3: Cross multiply
    493,031.34x = 680,369.40 × 278,191.40
  4. Step 4: Simplify right side
    493,031.34x = 189,272,912,501.31
  5. Step 5: Solve for x
    x = 189,272,912,501.31/493,031.34
  6. Step 6: Final answer
    x = 383,896.31

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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.