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Finding the Fourth Proportional to 663,143.04, 915,145.92 and 361,336.32

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Solution

The fourth proportional to 663,143.04, 915,145.92 and 361,336.32 is: 498,648.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,143.04 : 915,145.92 = 361,336.32 : x
  2. Step 2: Convert to fraction form
    663,143.04/915,145.92 = 361,336.32/x
  3. Step 3: Cross multiply
    663,143.04x = 915,145.92 × 361,336.32
  4. Step 4: Simplify right side
    663,143.04x = 330,675,458,995.81
  5. Step 5: Solve for x
    x = 330,675,458,995.81/663,143.04
  6. Step 6: Final answer
    x = 498,648.77

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1.5x scale

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.