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Finding the Fourth Proportional to 836,891.26, 1,155,466.02 and 642,953.50

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Solution

The fourth proportional to 836,891.26, 1,155,466.02 and 642,953.50 is: 887,703.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    836,891.26 : 1,155,466.02 = 642,953.50 : x
  2. Step 2: Convert to fraction form
    836,891.26/1,155,466.02 = 642,953.50/x
  3. Step 3: Cross multiply
    836,891.26x = 1,155,466.02 × 642,953.50
  4. Step 4: Simplify right side
    836,891.26x = 742,910,921,690.07
  5. Step 5: Solve for x
    x = 742,910,921,690.07/836,891.26
  6. Step 6: Final answer
    x = 887,703.05

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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.