Home / 638,455.77-881,075.78-351,986.11

Finding the Fourth Proportional to 638,455.77, 881,075.78 and 351,986.11

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Solution

The fourth proportional to 638,455.77, 881,075.78 and 351,986.11 is: 485,744.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,455.77 : 881,075.78 = 351,986.11 : x
  2. Step 2: Convert to fraction form
    638,455.77/881,075.78 = 351,986.11/x
  3. Step 3: Cross multiply
    638,455.77x = 881,075.78 × 351,986.11
  4. Step 4: Simplify right side
    638,455.77x = 310,126,433,774.74
  5. Step 5: Solve for x
    x = 310,126,433,774.74/638,455.77
  6. Step 6: Final answer
    x = 485,744.59

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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.