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Finding the Fourth Proportional to 339,980.20, 509,970.30 and 153,356.20

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Solution

The fourth proportional to 339,980.20, 509,970.30 and 153,356.20 is: 230,034.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,980.20 : 509,970.30 = 153,356.20 : x
  2. Step 2: Convert to fraction form
    339,980.20/509,970.30 = 153,356.20/x
  3. Step 3: Cross multiply
    339,980.20x = 509,970.30 × 153,356.20
  4. Step 4: Simplify right side
    339,980.20x = 78,207,107,320.86
  5. Step 5: Solve for x
    x = 78,207,107,320.86/339,980.20
  6. Step 6: Final answer
    x = 230,034.30

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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.