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Finding the Fourth Proportional to 640,412.16, 883,609.20 and 364,707.60

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Solution

The fourth proportional to 640,412.16, 883,609.20 and 364,707.60 is: 503,205.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,412.16 : 883,609.20 = 364,707.60 : x
  2. Step 2: Convert to fraction form
    640,412.16/883,609.20 = 364,707.60/x
  3. Step 3: Cross multiply
    640,412.16x = 883,609.20 × 364,707.60
  4. Step 4: Simplify right side
    640,412.16x = 322,258,990,669.92
  5. Step 5: Solve for x
    x = 322,258,990,669.92/640,412.16
  6. Step 6: Final answer
    x = 503,205.61

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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.