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Finding the Fourth Proportional to 484,813.40, 726,345.30 and 428,826.20

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Solution

The fourth proportional to 484,813.40, 726,345.30 and 428,826.20 is: 642,465.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,813.40 : 726,345.30 = 428,826.20 : x
  2. Step 2: Convert to fraction form
    484,813.40/726,345.30 = 428,826.20/x
  3. Step 3: Cross multiply
    484,813.40x = 726,345.30 × 428,826.20
  4. Step 4: Simplify right side
    484,813.40x = 311,475,894,886.86
  5. Step 5: Solve for x
    x = 311,475,894,886.86/484,813.40
  6. Step 6: Final answer
    x = 642,465.52

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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.