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Finding the Fourth Proportional to 1,277.35, 1,762.28 and 835.51

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Solution

The fourth proportional to 1,277.35, 1,762.28 and 835.51 is: 1,152.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.35 : 1,762.28 = 835.51 : x
  2. Step 2: Convert to fraction form
    1,277.35/1,762.28 = 835.51/x
  3. Step 3: Cross multiply
    1,277.35x = 1,762.28 × 835.51
  4. Step 4: Simplify right side
    1,277.35x = 1,472,393.75
  5. Step 5: Solve for x
    x = 1,472,393.75/1,277.35
  6. Step 6: Final answer
    x = 1,152.70

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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.