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Finding the Fourth Proportional to 517,085.40, 775,628.10 and 359,621.40

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Solution

The fourth proportional to 517,085.40, 775,628.10 and 359,621.40 is: 539,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,085.40 : 775,628.10 = 359,621.40 : x
  2. Step 2: Convert to fraction form
    517,085.40/775,628.10 = 359,621.40/x
  3. Step 3: Cross multiply
    517,085.40x = 775,628.10 × 359,621.40
  4. Step 4: Simplify right side
    517,085.40x = 278,932,463,201.34
  5. Step 5: Solve for x
    x = 278,932,463,201.34/517,085.40
  6. Step 6: Final answer
    x = 539,432.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.