Home / 728,009.60-1,004,638.08-405,718.40

Finding the Fourth Proportional to 728,009.60, 1,004,638.08 and 405,718.40

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Solution

The fourth proportional to 728,009.60, 1,004,638.08 and 405,718.40 is: 559,882.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,009.60 : 1,004,638.08 = 405,718.40 : x
  2. Step 2: Convert to fraction form
    728,009.60/1,004,638.08 = 405,718.40/x
  3. Step 3: Cross multiply
    728,009.60x = 1,004,638.08 × 405,718.40
  4. Step 4: Simplify right side
    728,009.60x = 407,600,154,396.67
  5. Step 5: Solve for x
    x = 407,600,154,396.67/728,009.60
  6. Step 6: Final answer
    x = 559,882.94

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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.