Home / 728,767.77-1,005,701.28-406,498.74

Finding the Fourth Proportional to 728,767.77, 1,005,701.28 and 406,498.74

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Solution

The fourth proportional to 728,767.77, 1,005,701.28 and 406,498.74 is: 560,969.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,767.77 : 1,005,701.28 = 406,498.74 : x
  2. Step 2: Convert to fraction form
    728,767.77/1,005,701.28 = 406,498.74/x
  3. Step 3: Cross multiply
    728,767.77x = 1,005,701.28 × 406,498.74
  4. Step 4: Simplify right side
    728,767.77x = 408,816,296,075.39
  5. Step 5: Solve for x
    x = 408,816,296,075.39/728,767.77
  6. Step 6: Final answer
    x = 560,969.24

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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.