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Finding the Fourth Proportional to 640,005.42, 883,198.32 and 349,613.54

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Solution

The fourth proportional to 640,005.42, 883,198.32 and 349,613.54 is: 482,461.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,005.42 : 883,198.32 = 349,613.54 : x
  2. Step 2: Convert to fraction form
    640,005.42/883,198.32 = 349,613.54/x
  3. Step 3: Cross multiply
    640,005.42x = 883,198.32 × 349,613.54
  4. Step 4: Simplify right side
    640,005.42x = 308,778,088,762.20
  5. Step 5: Solve for x
    x = 308,778,088,762.20/640,005.42
  6. Step 6: Final answer
    x = 482,461.68

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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.