Home / 742,640.89-1,024,769.63-420,294.87

Finding the Fourth Proportional to 742,640.89, 1,024,769.63 and 420,294.87

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Solution

The fourth proportional to 742,640.89, 1,024,769.63 and 420,294.87 is: 579,964.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,640.89 : 1,024,769.63 = 420,294.87 : x
  2. Step 2: Convert to fraction form
    742,640.89/1,024,769.63 = 420,294.87/x
  3. Step 3: Cross multiply
    742,640.89x = 1,024,769.63 × 420,294.87
  4. Step 4: Simplify right side
    742,640.89x = 430,705,418,420.80
  5. Step 5: Solve for x
    x = 430,705,418,420.80/742,640.89
  6. Step 6: Final answer
    x = 579,964.59

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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.