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Finding the Fourth Proportional to 1,503.86, 2,075.25 and 831.63

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Solution

The fourth proportional to 1,503.86, 2,075.25 and 831.63 is: 1,147.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.86 : 2,075.25 = 831.63 : x
  2. Step 2: Convert to fraction form
    1,503.86/2,075.25 = 831.63/x
  3. Step 3: Cross multiply
    1,503.86x = 2,075.25 × 831.63
  4. Step 4: Simplify right side
    1,503.86x = 1,725,846.38
  5. Step 5: Solve for x
    x = 1,725,846.38/1,503.86
  6. Step 6: Final answer
    x = 1,147.61

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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.