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Finding the Fourth Proportional to 836,891.76, 1,155,466.71 and 642,954

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Solution

The fourth proportional to 836,891.76, 1,155,466.71 and 642,954 is: 887,703.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    836,891.76 : 1,155,466.71 = 642,954 : x
  2. Step 2: Convert to fraction form
    836,891.76/1,155,466.71 = 642,954/x
  3. Step 3: Cross multiply
    836,891.76x = 1,155,466.71 × 642,954
  4. Step 4: Simplify right side
    836,891.76x = 742,911,943,061.34
  5. Step 5: Solve for x
    x = 742,911,943,061.34/836,891.76
  6. Step 6: Final answer
    x = 887,703.74

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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.