Home / 670,512.90-1,005,769.35-387,077.70

Finding the Fourth Proportional to 670,512.90, 1,005,769.35 and 387,077.70

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Solution

The fourth proportional to 670,512.90, 1,005,769.35 and 387,077.70 is: 580,616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,512.90 : 1,005,769.35 = 387,077.70 : x
  2. Step 2: Convert to fraction form
    670,512.90/1,005,769.35 = 387,077.70/x
  3. Step 3: Cross multiply
    670,512.90x = 1,005,769.35 × 387,077.70
  4. Step 4: Simplify right side
    670,512.90x = 389,310,886,728.50
  5. Step 5: Solve for x
    x = 389,310,886,728.50/670,512.90
  6. Step 6: Final answer
    x = 580,616.55

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Double scale
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Similar ratio
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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.