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Finding the Fourth Proportional to 353,080.82, 487,261.63 and 215,267.70

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Solution

The fourth proportional to 353,080.82, 487,261.63 and 215,267.70 is: 297,075.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,080.82 : 487,261.63 = 215,267.70 : x
  2. Step 2: Convert to fraction form
    353,080.82/487,261.63 = 215,267.70/x
  3. Step 3: Cross multiply
    353,080.82x = 487,261.63 × 215,267.70
  4. Step 4: Simplify right side
    353,080.82x = 104,891,689,903.36
  5. Step 5: Solve for x
    x = 104,891,689,903.36/353,080.82
  6. Step 6: Final answer
    x = 297,075.58

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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.