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Finding the Fourth Proportional to 545,618.88, 752,991.86 and 330,768

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Solution

The fourth proportional to 545,618.88, 752,991.86 and 330,768 is: 456,482.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,618.88 : 752,991.86 = 330,768 : x
  2. Step 2: Convert to fraction form
    545,618.88/752,991.86 = 330,768/x
  3. Step 3: Cross multiply
    545,618.88x = 752,991.86 × 330,768
  4. Step 4: Simplify right side
    545,618.88x = 249,065,611,548.48
  5. Step 5: Solve for x
    x = 249,065,611,548.48/545,618.88
  6. Step 6: Final answer
    x = 456,482.76

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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.