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Finding the Fourth Proportional to 485,072.88, 669,412.28 and 270,216.40

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Solution

The fourth proportional to 485,072.88, 669,412.28 and 270,216.40 is: 372,905.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,072.88 : 669,412.28 = 270,216.40 : x
  2. Step 2: Convert to fraction form
    485,072.88/669,412.28 = 270,216.40/x
  3. Step 3: Cross multiply
    485,072.88x = 669,412.28 × 270,216.40
  4. Step 4: Simplify right side
    485,072.88x = 180,886,176,417.39
  5. Step 5: Solve for x
    x = 180,886,176,417.39/485,072.88
  6. Step 6: Final answer
    x = 372,905.15

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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.