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Finding the Fourth Proportional to 312,373.32, 431,075.39 and 169,133.46

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Solution

The fourth proportional to 312,373.32, 431,075.39 and 169,133.46 is: 233,404.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,373.32 : 431,075.39 = 169,133.46 : x
  2. Step 2: Convert to fraction form
    312,373.32/431,075.39 = 169,133.46/x
  3. Step 3: Cross multiply
    312,373.32x = 431,075.39 × 169,133.46
  4. Step 4: Simplify right side
    312,373.32x = 72,909,271,385.88
  5. Step 5: Solve for x
    x = 72,909,271,385.88/312,373.32
  6. Step 6: Final answer
    x = 233,404.28

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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.