Home / 550,667.38-760,137.06-390,360.28

Finding the Fourth Proportional to 550,667.38, 760,137.06 and 390,360.28

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Solution

The fourth proportional to 550,667.38, 760,137.06 and 390,360.28 is: 538,850.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,667.38 : 760,137.06 = 390,360.28 : x
  2. Step 2: Convert to fraction form
    550,667.38/760,137.06 = 390,360.28/x
  3. Step 3: Cross multiply
    550,667.38x = 760,137.06 × 390,360.28
  4. Step 4: Simplify right side
    550,667.38x = 296,727,315,579.98
  5. Step 5: Solve for x
    x = 296,727,315,579.98/550,667.38
  6. Step 6: Final answer
    x = 538,850.36

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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.