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Finding the Fourth Proportional to 480,012.60, 718,269.30 and 438,022.20

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Solution

The fourth proportional to 480,012.60, 718,269.30 and 438,022.20 is: 655,436.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,012.60 : 718,269.30 = 438,022.20 : x
  2. Step 2: Convert to fraction form
    480,012.60/718,269.30 = 438,022.20/x
  3. Step 3: Cross multiply
    480,012.60x = 718,269.30 × 438,022.20
  4. Step 4: Simplify right side
    480,012.60x = 314,617,898,978.46
  5. Step 5: Solve for x
    x = 314,617,898,978.46/480,012.60
  6. Step 6: Final answer
    x = 655,436.75

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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.