Home / 645,789.47-968,685.01-308,750.90

Finding the Fourth Proportional to 645,789.47, 968,685.01 and 308,750.90

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Solution

The fourth proportional to 645,789.47, 968,685.01 and 308,750.90 is: 463,126.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,789.47 : 968,685.01 = 308,750.90 : x
  2. Step 2: Convert to fraction form
    645,789.47/968,685.01 = 308,750.90/x
  3. Step 3: Cross multiply
    645,789.47x = 968,685.01 × 308,750.90
  4. Step 4: Simplify right side
    645,789.47x = 299,082,363,038.71
  5. Step 5: Solve for x
    x = 299,082,363,038.71/645,789.47
  6. Step 6: Final answer
    x = 463,126.73

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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.