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Finding the Fourth Proportional to 1,008,321, 1,391,512.68 and 555,641.16

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Solution

The fourth proportional to 1,008,321, 1,391,512.68 and 555,641.16 is: 766,801.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008,321 : 1,391,512.68 = 555,641.16 : x
  2. Step 2: Convert to fraction form
    1,008,321/1,391,512.68 = 555,641.16/x
  3. Step 3: Cross multiply
    1,008,321x = 1,391,512.68 × 555,641.16
  4. Step 4: Simplify right side
    1,008,321x = 773,181,719,669.91
  5. Step 5: Solve for x
    x = 773,181,719,669.91/1,008,321
  6. Step 6: Final answer
    x = 766,801.17

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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.