Home / 564,481.20-778,981.32-309,836.72

Finding the Fourth Proportional to 564,481.20, 778,981.32 and 309,836.72

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Solution

The fourth proportional to 564,481.20, 778,981.32 and 309,836.72 is: 427,573.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,481.20 : 778,981.32 = 309,836.72 : x
  2. Step 2: Convert to fraction form
    564,481.20/778,981.32 = 309,836.72/x
  3. Step 3: Cross multiply
    564,481.20x = 778,981.32 × 309,836.72
  4. Step 4: Simplify right side
    564,481.20x = 241,357,017,130.07
  5. Step 5: Solve for x
    x = 241,357,017,130.07/564,481.20
  6. Step 6: Final answer
    x = 427,573.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.