Home / 729,707.78-1,006,987.20-407,423.36

Finding the Fourth Proportional to 729,707.78, 1,006,987.20 and 407,423.36

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Solution

The fourth proportional to 729,707.78, 1,006,987.20 and 407,423.36 is: 562,238.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,707.78 : 1,006,987.20 = 407,423.36 : x
  2. Step 2: Convert to fraction form
    729,707.78/1,006,987.20 = 407,423.36/x
  3. Step 3: Cross multiply
    729,707.78x = 1,006,987.20 × 407,423.36
  4. Step 4: Simplify right side
    729,707.78x = 410,270,108,500.99
  5. Step 5: Solve for x
    x = 410,270,108,500.99/729,707.78
  6. Step 6: Final answer
    x = 562,238.91

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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.