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Finding the Fourth Proportional to 553,691.20, 828,787.20 and 434,718.40

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Solution

The fourth proportional to 553,691.20, 828,787.20 and 434,718.40 is: 650,703.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,691.20 : 828,787.20 = 434,718.40 : x
  2. Step 2: Convert to fraction form
    553,691.20/828,787.20 = 434,718.40/x
  3. Step 3: Cross multiply
    553,691.20x = 828,787.20 × 434,718.40
  4. Step 4: Simplify right side
    553,691.20x = 360,289,045,524.48
  5. Step 5: Solve for x
    x = 360,289,045,524.48/553,691.20
  6. Step 6: Final answer
    x = 650,703.94

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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.