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Finding the Fourth Proportional to 1,058.31, 1,586.91 and 619.71

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Solution

The fourth proportional to 1,058.31, 1,586.91 and 619.71 is: 929.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.31 : 1,586.91 = 619.71 : x
  2. Step 2: Convert to fraction form
    1,058.31/1,586.91 = 619.71/x
  3. Step 3: Cross multiply
    1,058.31x = 1,586.91 × 619.71
  4. Step 4: Simplify right side
    1,058.31x = 983,424.00
  5. Step 5: Solve for x
    x = 983,424.00/1,058.31
  6. Step 6: Final answer
    x = 929.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.