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Finding the Fourth Proportional to 489,279.60, 733,919.40 and 339,980.40

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Solution

The fourth proportional to 489,279.60, 733,919.40 and 339,980.40 is: 509,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,279.60 : 733,919.40 = 339,980.40 : x
  2. Step 2: Convert to fraction form
    489,279.60/733,919.40 = 339,980.40/x
  3. Step 3: Cross multiply
    489,279.60x = 733,919.40 × 339,980.40
  4. Step 4: Simplify right side
    489,279.60x = 249,518,211,179.76
  5. Step 5: Solve for x
    x = 249,518,211,179.76/489,279.60
  6. Step 6: Final answer
    x = 509,970.60

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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.