Home / 1,315,051.20-1,972,576.80-428,587.20

Finding the Fourth Proportional to 1,315,051.20, 1,972,576.80 and 428,587.20

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Solution

The fourth proportional to 1,315,051.20, 1,972,576.80 and 428,587.20 is: 642,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,051.20 : 1,972,576.80 = 428,587.20 : x
  2. Step 2: Convert to fraction form
    1,315,051.20/1,972,576.80 = 428,587.20/x
  3. Step 3: Cross multiply
    1,315,051.20x = 1,972,576.80 × 428,587.20
  4. Step 4: Simplify right side
    1,315,051.20x = 845,421,167,496.96
  5. Step 5: Solve for x
    x = 845,421,167,496.96/1,315,051.20
  6. Step 6: Final answer
    x = 642,880.80

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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.