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Finding the Fourth Proportional to 1,214,821.91, 1,676,640.51 and 749,946.51

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Solution

The fourth proportional to 1,214,821.91, 1,676,640.51 and 749,946.51 is: 1,035,041.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214,821.91 : 1,676,640.51 = 749,946.51 : x
  2. Step 2: Convert to fraction form
    1,214,821.91/1,676,640.51 = 749,946.51/x
  3. Step 3: Cross multiply
    1,214,821.91x = 1,676,640.51 × 749,946.51
  4. Step 4: Simplify right side
    1,214,821.91x = 1,257,390,698,999.12
  5. Step 5: Solve for x
    x = 1,257,390,698,999.12/1,214,821.91
  6. Step 6: Final answer
    x = 1,035,041.17

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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.