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Finding the Fourth Proportional to 779.39, 1,075.52 and 558.71

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Solution

The fourth proportional to 779.39, 1,075.52 and 558.71 is: 770.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.39 : 1,075.52 = 558.71 : x
  2. Step 2: Convert to fraction form
    779.39/1,075.52 = 558.71/x
  3. Step 3: Cross multiply
    779.39x = 1,075.52 × 558.71
  4. Step 4: Simplify right side
    779.39x = 600,895.61
  5. Step 5: Solve for x
    x = 600,895.61/779.39
  6. Step 6: Final answer
    x = 770.99

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Double scale
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1.5x scale

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.