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Finding the Fourth Proportional to 941.93, 1,299.59 and 647.29

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Solution

The fourth proportional to 941.93, 1,299.59 and 647.29 is: 893.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.93 : 1,299.59 = 647.29 : x
  2. Step 2: Convert to fraction form
    941.93/1,299.59 = 647.29/x
  3. Step 3: Cross multiply
    941.93x = 1,299.59 × 647.29
  4. Step 4: Simplify right side
    941.93x = 841,216.07
  5. Step 5: Solve for x
    x = 841,216.07/941.93
  6. Step 6: Final answer
    x = 893.08

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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.