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Finding the Fourth Proportional to 489,379.60, 734,069.40 and 340,080.40

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Solution

The fourth proportional to 489,379.60, 734,069.40 and 340,080.40 is: 510,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,379.60 : 734,069.40 = 340,080.40 : x
  2. Step 2: Convert to fraction form
    489,379.60/734,069.40 = 340,080.40/x
  3. Step 3: Cross multiply
    489,379.60x = 734,069.40 × 340,080.40
  4. Step 4: Simplify right side
    489,379.60x = 249,642,615,179.76
  5. Step 5: Solve for x
    x = 249,642,615,179.76/489,379.60
  6. Step 6: Final answer
    x = 510,120.60

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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.