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Finding the Fourth Proportional to 1,533.06, 2,115.96 and 870.30

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Solution

The fourth proportional to 1,533.06, 2,115.96 and 870.30 is: 1,201.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,533.06 : 2,115.96 = 870.30 : x
  2. Step 2: Convert to fraction form
    1,533.06/2,115.96 = 870.30/x
  3. Step 3: Cross multiply
    1,533.06x = 2,115.96 × 870.30
  4. Step 4: Simplify right side
    1,533.06x = 1,841,519.99
  5. Step 5: Solve for x
    x = 1,841,519.99/1,533.06
  6. Step 6: Final answer
    x = 1,201.21

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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.