Home / 1,121,403.88-1,547,306.34-644,383.72

Finding the Fourth Proportional to 1,121,403.88, 1,547,306.34 and 644,383.72

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Solution

The fourth proportional to 1,121,403.88, 1,547,306.34 and 644,383.72 is: 889,116.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,403.88 : 1,547,306.34 = 644,383.72 : x
  2. Step 2: Convert to fraction form
    1,121,403.88/1,547,306.34 = 644,383.72/x
  3. Step 3: Cross multiply
    1,121,403.88x = 1,547,306.34 × 644,383.72
  4. Step 4: Simplify right side
    1,121,403.88x = 997,059,015,348.79
  5. Step 5: Solve for x
    x = 997,059,015,348.79/1,121,403.88
  6. Step 6: Final answer
    x = 889,116.79

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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.