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Finding the Fourth Proportional to 1,220,703, 1,684,590.42 and 676,861.74

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Solution

The fourth proportional to 1,220,703, 1,684,590.42 and 676,861.74 is: 934,080.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,703 : 1,684,590.42 = 676,861.74 : x
  2. Step 2: Convert to fraction form
    1,220,703/1,684,590.42 = 676,861.74/x
  3. Step 3: Cross multiply
    1,220,703x = 1,684,590.42 × 676,861.74
  4. Step 4: Simplify right side
    1,220,703x = 1,140,234,802,868.53
  5. Step 5: Solve for x
    x = 1,140,234,802,868.53/1,220,703
  6. Step 6: Final answer
    x = 934,080.45

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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.