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Finding the Fourth Proportional to 1,127.47, 1,555.93 and 623.32

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Solution

The fourth proportional to 1,127.47, 1,555.93 and 623.32 is: 860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.47 : 1,555.93 = 623.32 : x
  2. Step 2: Convert to fraction form
    1,127.47/1,555.93 = 623.32/x
  3. Step 3: Cross multiply
    1,127.47x = 1,555.93 × 623.32
  4. Step 4: Simplify right side
    1,127.47x = 969,840.93
  5. Step 5: Solve for x
    x = 969,840.93/1,127.47
  6. Step 6: Final answer
    x = 860.20

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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.