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Finding the Fourth Proportional to 487,068.90, 729,619.20 and 276,460.80

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Solution

The fourth proportional to 487,068.90, 729,619.20 and 276,460.80 is: 414,132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,068.90 : 729,619.20 = 276,460.80 : x
  2. Step 2: Convert to fraction form
    487,068.90/729,619.20 = 276,460.80/x
  3. Step 3: Cross multiply
    487,068.90x = 729,619.20 × 276,460.80
  4. Step 4: Simplify right side
    487,068.90x = 201,711,107,727.36
  5. Step 5: Solve for x
    x = 201,711,107,727.36/487,068.90
  6. Step 6: Final answer
    x = 414,132.60

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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.