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Finding the Fourth Proportional to 875,796.80, 1,314,278.40 and 402,238.40

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Solution

The fourth proportional to 875,796.80, 1,314,278.40 and 402,238.40 is: 603,625.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,796.80 : 1,314,278.40 = 402,238.40 : x
  2. Step 2: Convert to fraction form
    875,796.80/1,314,278.40 = 402,238.40/x
  3. Step 3: Cross multiply
    875,796.80x = 1,314,278.40 × 402,238.40
  4. Step 4: Simplify right side
    875,796.80x = 528,653,240,770.56
  5. Step 5: Solve for x
    x = 528,653,240,770.56/875,796.80
  6. Step 6: Final answer
    x = 603,625.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.