Home / 385,974.17-531,979.34-256,681.56

Finding the Fourth Proportional to 385,974.17, 531,979.34 and 256,681.56

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Solution

The fourth proportional to 385,974.17, 531,979.34 and 256,681.56 is: 353,778.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,974.17 : 531,979.34 = 256,681.56 : x
  2. Step 2: Convert to fraction form
    385,974.17/531,979.34 = 256,681.56/x
  3. Step 3: Cross multiply
    385,974.17x = 531,979.34 × 256,681.56
  4. Step 4: Simplify right side
    385,974.17x = 136,549,287,520.67
  5. Step 5: Solve for x
    x = 136,549,287,520.67/385,974.17
  6. Step 6: Final answer
    x = 353,778.31

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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.