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Finding the Fourth Proportional to 321,799.80, 483,477.30 and 287,585.40

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Solution

The fourth proportional to 321,799.80, 483,477.30 and 287,585.40 is: 432,073.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,799.80 : 483,477.30 = 287,585.40 : x
  2. Step 2: Convert to fraction form
    321,799.80/483,477.30 = 287,585.40/x
  3. Step 3: Cross multiply
    321,799.80x = 483,477.30 × 287,585.40
  4. Step 4: Simplify right side
    321,799.80x = 139,041,012,711.42
  5. Step 5: Solve for x
    x = 139,041,012,711.42/321,799.80
  6. Step 6: Final answer
    x = 432,073.02

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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.