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Finding the Fourth Proportional to 840.49, 1,259.25 and 717.51

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Solution

The fourth proportional to 840.49, 1,259.25 and 717.51 is: 1,075.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.49 : 1,259.25 = 717.51 : x
  2. Step 2: Convert to fraction form
    840.49/1,259.25 = 717.51/x
  3. Step 3: Cross multiply
    840.49x = 1,259.25 × 717.51
  4. Step 4: Simplify right side
    840.49x = 903,524.47
  5. Step 5: Solve for x
    x = 903,524.47/840.49
  6. Step 6: Final answer
    x = 1,075.00

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1.5x scale

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.