Home / 1,288,235.52-1,779,438.24-980,442

Finding the Fourth Proportional to 1,288,235.52, 1,779,438.24 and 980,442

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Solution

The fourth proportional to 1,288,235.52, 1,779,438.24 and 980,442 is: 1,354,283.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,235.52 : 1,779,438.24 = 980,442 : x
  2. Step 2: Convert to fraction form
    1,288,235.52/1,779,438.24 = 980,442/x
  3. Step 3: Cross multiply
    1,288,235.52x = 1,779,438.24 × 980,442
  4. Step 4: Simplify right side
    1,288,235.52x = 1,744,635,986,902.08
  5. Step 5: Solve for x
    x = 1,744,635,986,902.08/1,288,235.52
  6. Step 6: Final answer
    x = 1,354,283.41

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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.