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Finding the Fourth Proportional to 257,075.80, 385,556.10 and 168,947.80

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Solution

The fourth proportional to 257,075.80, 385,556.10 and 168,947.80 is: 253,383.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,075.80 : 385,556.10 = 168,947.80 : x
  2. Step 2: Convert to fraction form
    257,075.80/385,556.10 = 168,947.80/x
  3. Step 3: Cross multiply
    257,075.80x = 385,556.10 × 168,947.80
  4. Step 4: Simplify right side
    257,075.80x = 65,138,854,871.58
  5. Step 5: Solve for x
    x = 65,138,854,871.58/257,075.80
  6. Step 6: Final answer
    x = 253,383.85

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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.