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Finding the Fourth Proportional to 980,879.80, 1,471,319.70 and 507,710.20

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Solution

The fourth proportional to 980,879.80, 1,471,319.70 and 507,710.20 is: 761,565.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,879.80 : 1,471,319.70 = 507,710.20 : x
  2. Step 2: Convert to fraction form
    980,879.80/1,471,319.70 = 507,710.20/x
  3. Step 3: Cross multiply
    980,879.80x = 1,471,319.70 × 507,710.20
  4. Step 4: Simplify right side
    980,879.80x = 747,004,019,150.94
  5. Step 5: Solve for x
    x = 747,004,019,150.94/980,879.80
  6. Step 6: Final answer
    x = 761,565.30

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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.