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Finding the Fourth Proportional to 640,880.72, 962,152.16 and 429,004.16

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Solution

The fourth proportional to 640,880.72, 962,152.16 and 429,004.16 is: 644,062.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,880.72 : 962,152.16 = 429,004.16 : x
  2. Step 2: Convert to fraction form
    640,880.72/962,152.16 = 429,004.16/x
  3. Step 3: Cross multiply
    640,880.72x = 962,152.16 × 429,004.16
  4. Step 4: Simplify right side
    640,880.72x = 412,767,279,192.99
  5. Step 5: Solve for x
    x = 412,767,279,192.99/640,880.72
  6. Step 6: Final answer
    x = 644,062.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.