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Finding the Fourth Proportional to 779.04, 1,075.06 and 429.72

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Solution

The fourth proportional to 779.04, 1,075.06 and 429.72 is: 593.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.04 : 1,075.06 = 429.72 : x
  2. Step 2: Convert to fraction form
    779.04/1,075.06 = 429.72/x
  3. Step 3: Cross multiply
    779.04x = 1,075.06 × 429.72
  4. Step 4: Simplify right side
    779.04x = 461,974.78
  5. Step 5: Solve for x
    x = 461,974.78/779.04
  6. Step 6: Final answer
    x = 593.01

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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.