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Finding the Fourth Proportional to 507,901.22, 700,761.86 and 400,136.80

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Solution

The fourth proportional to 507,901.22, 700,761.86 and 400,136.80 is: 552,077.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,901.22 : 700,761.86 = 400,136.80 : x
  2. Step 2: Convert to fraction form
    507,901.22/700,761.86 = 400,136.80/x
  3. Step 3: Cross multiply
    507,901.22x = 700,761.86 × 400,136.80
  4. Step 4: Simplify right side
    507,901.22x = 280,400,608,222.45
  5. Step 5: Solve for x
    x = 280,400,608,222.45/507,901.22
  6. Step 6: Final answer
    x = 552,077.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.