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Finding the Fourth Proportional to 1,220,854.72, 1,684,771 and 676,990.80

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Solution

The fourth proportional to 1,220,854.72, 1,684,771 and 676,990.80 is: 934,242.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,854.72 : 1,684,771 = 676,990.80 : x
  2. Step 2: Convert to fraction form
    1,220,854.72/1,684,771 = 676,990.80/x
  3. Step 3: Cross multiply
    1,220,854.72x = 1,684,771 × 676,990.80
  4. Step 4: Simplify right side
    1,220,854.72x = 1,140,574,467,106.80
  5. Step 5: Solve for x
    x = 1,140,574,467,106.80/1,220,854.72
  6. Step 6: Final answer
    x = 934,242.58

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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.