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Finding the Fourth Proportional to 1,075.90, 1,484.30 and 702.75

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Solution

The fourth proportional to 1,075.90, 1,484.30 and 702.75 is: 969.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.90 : 1,484.30 = 702.75 : x
  2. Step 2: Convert to fraction form
    1,075.90/1,484.30 = 702.75/x
  3. Step 3: Cross multiply
    1,075.90x = 1,484.30 × 702.75
  4. Step 4: Simplify right side
    1,075.90x = 1,043,091.83
  5. Step 5: Solve for x
    x = 1,043,091.83/1,075.90
  6. Step 6: Final answer
    x = 969.51

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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.