Home / 728,172.98-1,005,309.80-647,377.34

Finding the Fourth Proportional to 728,172.98, 1,005,309.80 and 647,377.34

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Solution

The fourth proportional to 728,172.98, 1,005,309.80 and 647,377.34 is: 893,763.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,172.98 : 1,005,309.80 = 647,377.34 : x
  2. Step 2: Convert to fraction form
    728,172.98/1,005,309.80 = 647,377.34/x
  3. Step 3: Cross multiply
    728,172.98x = 1,005,309.80 × 647,377.34
  4. Step 4: Simplify right side
    728,172.98x = 650,814,784,199.93
  5. Step 5: Solve for x
    x = 650,814,784,199.93/728,172.98
  6. Step 6: Final answer
    x = 893,763.98

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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.