Home / 1,020,810.72-1,530,818.64-421,868.64

Finding the Fourth Proportional to 1,020,810.72, 1,530,818.64 and 421,868.64

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Solution

The fourth proportional to 1,020,810.72, 1,530,818.64 and 421,868.64 is: 632,638.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020,810.72 : 1,530,818.64 = 421,868.64 : x
  2. Step 2: Convert to fraction form
    1,020,810.72/1,530,818.64 = 421,868.64/x
  3. Step 3: Cross multiply
    1,020,810.72x = 1,530,818.64 × 421,868.64
  4. Step 4: Simplify right side
    1,020,810.72x = 645,804,377,743.45
  5. Step 5: Solve for x
    x = 645,804,377,743.45/1,020,810.72
  6. Step 6: Final answer
    x = 632,638.71

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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.