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Finding the Fourth Proportional to 990,318.70, 1,485,578.70 and 341,810.50

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Solution

The fourth proportional to 990,318.70, 1,485,578.70 and 341,810.50 is: 512,750.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,318.70 : 1,485,578.70 = 341,810.50 : x
  2. Step 2: Convert to fraction form
    990,318.70/1,485,578.70 = 341,810.50/x
  3. Step 3: Cross multiply
    990,318.70x = 1,485,578.70 × 341,810.50
  4. Step 4: Simplify right side
    990,318.70x = 507,786,398,236.35
  5. Step 5: Solve for x
    x = 507,786,398,236.35/990,318.70
  6. Step 6: Final answer
    x = 512,750.49

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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.