Home / 742,639.89-1,024,768.25-420,293.87

Finding the Fourth Proportional to 742,639.89, 1,024,768.25 and 420,293.87

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Solution

The fourth proportional to 742,639.89, 1,024,768.25 and 420,293.87 is: 579,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,639.89 : 1,024,768.25 = 420,293.87 : x
  2. Step 2: Convert to fraction form
    742,639.89/1,024,768.25 = 420,293.87/x
  3. Step 3: Cross multiply
    742,639.89x = 1,024,768.25 × 420,293.87
  4. Step 4: Simplify right side
    742,639.89x = 430,703,813,645.63
  5. Step 5: Solve for x
    x = 430,703,813,645.63/742,639.89
  6. Step 6: Final answer
    x = 579,963.21

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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.