Home / 670,385.20-1,005,905.40-315,434.32

Finding the Fourth Proportional to 670,385.20, 1,005,905.40 and 315,434.32

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Solution

The fourth proportional to 670,385.20, 1,005,905.40 and 315,434.32 is: 473,305.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,385.20 : 1,005,905.40 = 315,434.32 : x
  2. Step 2: Convert to fraction form
    670,385.20/1,005,905.40 = 315,434.32/x
  3. Step 3: Cross multiply
    670,385.20x = 1,005,905.40 × 315,434.32
  4. Step 4: Simplify right side
    670,385.20x = 317,297,085,833.33
  5. Step 5: Solve for x
    x = 317,297,085,833.33/670,385.20
  6. Step 6: Final answer
    x = 473,305.62

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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.