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Finding the Fourth Proportional to 955.83, 1,319.82 and 778.82

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Solution

The fourth proportional to 955.83, 1,319.82 and 778.82 is: 1,075.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.83 : 1,319.82 = 778.82 : x
  2. Step 2: Convert to fraction form
    955.83/1,319.82 = 778.82/x
  3. Step 3: Cross multiply
    955.83x = 1,319.82 × 778.82
  4. Step 4: Simplify right side
    955.83x = 1,027,895.61
  5. Step 5: Solve for x
    x = 1,027,895.61/955.83
  6. Step 6: Final answer
    x = 1,075.40

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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.