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Finding the Fourth Proportional to 660,636.22, 911,421.57 and 467,328.10

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Solution

The fourth proportional to 660,636.22, 911,421.57 and 467,328.10 is: 644,731.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,636.22 : 911,421.57 = 467,328.10 : x
  2. Step 2: Convert to fraction form
    660,636.22/911,421.57 = 467,328.10/x
  3. Step 3: Cross multiply
    660,636.22x = 911,421.57 × 467,328.10
  4. Step 4: Simplify right side
    660,636.22x = 425,932,910,607.12
  5. Step 5: Solve for x
    x = 425,932,910,607.12/660,636.22
  6. Step 6: Final answer
    x = 644,731.39

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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.