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Finding the Fourth Proportional to 718,522,762.35, 991,555,636.50 and 417,136,039.41

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Solution

The fourth proportional to 718,522,762.35, 991,555,636.50 and 417,136,039.41 is: 575,644,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,522,762.35 : 991,555,636.50 = 417,136,039.41 : x
  2. Step 2: Convert to fraction form
    718,522,762.35/991,555,636.50 = 417,136,039.41/x
  3. Step 3: Cross multiply
    718,522,762.35x = 991,555,636.50 × 417,136,039.41
  4. Step 4: Simplify right side
    718,522,762.35x = 413,613,591,064,271,680
  5. Step 5: Solve for x
    x = 413,613,591,064,271,680/718,522,762.35
  6. Step 6: Final answer
    x = 575,644,381.41

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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.