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Finding the Fourth Proportional to 922,742.60, 1,271,495.22 and 680,641.70

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Solution

The fourth proportional to 922,742.60, 1,271,495.22 and 680,641.70 is: 937,891.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,742.60 : 1,271,495.22 = 680,641.70 : x
  2. Step 2: Convert to fraction form
    922,742.60/1,271,495.22 = 680,641.70/x
  3. Step 3: Cross multiply
    922,742.60x = 1,271,495.22 × 680,641.70
  4. Step 4: Simplify right side
    922,742.60x = 865,432,668,082.67
  5. Step 5: Solve for x
    x = 865,432,668,082.67/922,742.60
  6. Step 6: Final answer
    x = 937,891.75

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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.