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Finding the Fourth Proportional to 643,886.40, 965,959.20 and 223,075.20

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Solution

The fourth proportional to 643,886.40, 965,959.20 and 223,075.20 is: 334,657.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,886.40 : 965,959.20 = 223,075.20 : x
  2. Step 2: Convert to fraction form
    643,886.40/965,959.20 = 223,075.20/x
  3. Step 3: Cross multiply
    643,886.40x = 965,959.20 × 223,075.20
  4. Step 4: Simplify right side
    643,886.40x = 215,481,541,731.84
  5. Step 5: Solve for x
    x = 215,481,541,731.84/643,886.40
  6. Step 6: Final answer
    x = 334,657.70

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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.