Home / 670,500.10-1,005,750.15-639,396.10

Finding the Fourth Proportional to 670,500.10, 1,005,750.15 and 639,396.10

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Solution

The fourth proportional to 670,500.10, 1,005,750.15 and 639,396.10 is: 959,094.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,500.10 : 1,005,750.15 = 639,396.10 : x
  2. Step 2: Convert to fraction form
    670,500.10/1,005,750.15 = 639,396.10/x
  3. Step 3: Cross multiply
    670,500.10x = 1,005,750.15 × 639,396.10
  4. Step 4: Simplify right side
    670,500.10x = 643,072,723,484.42
  5. Step 5: Solve for x
    x = 643,072,723,484.42/670,500.10
  6. Step 6: Final answer
    x = 959,094.15

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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.