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Finding the Fourth Proportional to 312,373.57, 431,075.73 and 169,133.71

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Solution

The fourth proportional to 312,373.57, 431,075.73 and 169,133.71 is: 233,404.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,373.57 : 431,075.73 = 169,133.71 : x
  2. Step 2: Convert to fraction form
    312,373.57/431,075.73 = 169,133.71/x
  3. Step 3: Cross multiply
    312,373.57x = 431,075.73 × 169,133.71
  4. Step 4: Simplify right side
    312,373.57x = 72,909,437,505.86
  5. Step 5: Solve for x
    x = 72,909,437,505.86/312,373.57
  6. Step 6: Final answer
    x = 233,404.63

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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.