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Finding the Fourth Proportional to 339,146.70, 508,720.05 and 260,657.10

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Solution

The fourth proportional to 339,146.70, 508,720.05 and 260,657.10 is: 390,985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,146.70 : 508,720.05 = 260,657.10 : x
  2. Step 2: Convert to fraction form
    339,146.70/508,720.05 = 260,657.10/x
  3. Step 3: Cross multiply
    339,146.70x = 508,720.05 × 260,657.10
  4. Step 4: Simplify right side
    339,146.70x = 132,601,492,944.86
  5. Step 5: Solve for x
    x = 132,601,492,944.86/339,146.70
  6. Step 6: Final answer
    x = 390,985.65

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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.