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Finding the Fourth Proportional to 360,020.80, 539,383.20 and 285,630.40

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Solution

The fourth proportional to 360,020.80, 539,383.20 and 285,630.40 is: 427,931.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    360,020.80 : 539,383.20 = 285,630.40 : x
  2. Step 2: Convert to fraction form
    360,020.80/539,383.20 = 285,630.40/x
  3. Step 3: Cross multiply
    360,020.80x = 539,383.20 × 285,630.40
  4. Step 4: Simplify right side
    360,020.80x = 154,064,239,169.28
  5. Step 5: Solve for x
    x = 154,064,239,169.28/360,020.80
  6. Step 6: Final answer
    x = 427,931.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.