Home / 1,020,638.20-1,530,301.20-421,837.60

Finding the Fourth Proportional to 1,020,638.20, 1,530,301.20 and 421,837.60

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Solution

The fourth proportional to 1,020,638.20, 1,530,301.20 and 421,837.60 is: 632,485.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020,638.20 : 1,530,301.20 = 421,837.60 : x
  2. Step 2: Convert to fraction form
    1,020,638.20/1,530,301.20 = 421,837.60/x
  3. Step 3: Cross multiply
    1,020,638.20x = 1,530,301.20 × 421,837.60
  4. Step 4: Simplify right side
    1,020,638.20x = 645,538,585,485.12
  5. Step 5: Solve for x
    x = 645,538,585,485.12/1,020,638.20
  6. Step 6: Final answer
    x = 632,485.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.