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Finding the Fourth Proportional to 640,494.72, 883,886.18 and 350,106.68

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Solution

The fourth proportional to 640,494.72, 883,886.18 and 350,106.68 is: 483,149.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,494.72 : 883,886.18 = 350,106.68 : x
  2. Step 2: Convert to fraction form
    640,494.72/883,886.18 = 350,106.68/x
  3. Step 3: Cross multiply
    640,494.72x = 883,886.18 × 350,106.68
  4. Step 4: Simplify right side
    640,494.72x = 309,454,455,977.68
  5. Step 5: Solve for x
    x = 309,454,455,977.68/640,494.72
  6. Step 6: Final answer
    x = 483,149.11

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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.