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Finding the Fourth Proportional to 946.72, 1,307.10 and 779.08

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Solution

The fourth proportional to 946.72, 1,307.10 and 779.08 is: 1,075.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.72 : 1,307.10 = 779.08 : x
  2. Step 2: Convert to fraction form
    946.72/1,307.10 = 779.08/x
  3. Step 3: Cross multiply
    946.72x = 1,307.10 × 779.08
  4. Step 4: Simplify right side
    946.72x = 1,018,335.47
  5. Step 5: Solve for x
    x = 1,018,335.47/946.72
  6. Step 6: Final answer
    x = 1,075.65

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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.