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Finding the Fourth Proportional to 718,354.22, 991,969.62 and 684,324.50

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Solution

The fourth proportional to 718,354.22, 991,969.62 and 684,324.50 is: 944,978.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,354.22 : 991,969.62 = 684,324.50 : x
  2. Step 2: Convert to fraction form
    718,354.22/991,969.62 = 684,324.50/x
  3. Step 3: Cross multiply
    718,354.22x = 991,969.62 × 684,324.50
  4. Step 4: Simplify right side
    718,354.22x = 678,829,114,221.69
  5. Step 5: Solve for x
    x = 678,829,114,221.69/718,354.22
  6. Step 6: Final answer
    x = 944,978.25

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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.