Home / 728,011.09-1,004,684.34-405,718.30

Finding the Fourth Proportional to 728,011.09, 1,004,684.34 and 405,718.30

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Solution

The fourth proportional to 728,011.09, 1,004,684.34 and 405,718.30 is: 559,907.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,011.09 : 1,004,684.34 = 405,718.30 : x
  2. Step 2: Convert to fraction form
    728,011.09/1,004,684.34 = 405,718.30/x
  3. Step 3: Cross multiply
    728,011.09x = 1,004,684.34 × 405,718.30
  4. Step 4: Simplify right side
    728,011.09x = 407,618,822,461.42
  5. Step 5: Solve for x
    x = 407,618,822,461.42/728,011.09
  6. Step 6: Final answer
    x = 559,907.44

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Double scale
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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.