Home / 1,208,999.02-1,668,418.63-665,123.13

Finding the Fourth Proportional to 1,208,999.02, 1,668,418.63 and 665,123.13

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Solution

The fourth proportional to 1,208,999.02, 1,668,418.63 and 665,123.13 is: 917,869.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,999.02 : 1,668,418.63 = 665,123.13 : x
  2. Step 2: Convert to fraction form
    1,208,999.02/1,668,418.63 = 665,123.13/x
  3. Step 3: Cross multiply
    1,208,999.02x = 1,668,418.63 × 665,123.13
  4. Step 4: Simplify right side
    1,208,999.02x = 1,109,703,821,335.91
  5. Step 5: Solve for x
    x = 1,109,703,821,335.91/1,208,999.02
  6. Step 6: Final answer
    x = 917,869.91

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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.