Home / 743,412.48-1,025,906.40-421,121.28

Finding the Fourth Proportional to 743,412.48, 1,025,906.40 and 421,121.28

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Solution

The fourth proportional to 743,412.48, 1,025,906.40 and 421,121.28 is: 581,145.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,412.48 : 1,025,906.40 = 421,121.28 : x
  2. Step 2: Convert to fraction form
    743,412.48/1,025,906.40 = 421,121.28/x
  3. Step 3: Cross multiply
    743,412.48x = 1,025,906.40 × 421,121.28
  4. Step 4: Simplify right side
    743,412.48x = 432,031,016,328.19
  5. Step 5: Solve for x
    x = 432,031,016,328.19/743,412.48
  6. Step 6: Final answer
    x = 581,145.77

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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.