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Finding the Fourth Proportional to 776,135.08, 1,071,213.54 and 485,881

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Solution

The fourth proportional to 776,135.08, 1,071,213.54 and 485,881 is: 670,607.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,135.08 : 1,071,213.54 = 485,881 : x
  2. Step 2: Convert to fraction form
    776,135.08/1,071,213.54 = 485,881/x
  3. Step 3: Cross multiply
    776,135.08x = 1,071,213.54 × 485,881
  4. Step 4: Simplify right side
    776,135.08x = 520,482,306,028.74
  5. Step 5: Solve for x
    x = 520,482,306,028.74/776,135.08
  6. Step 6: Final answer
    x = 670,607.89

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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.