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Finding the Fourth Proportional to 660,879.90, 912,012 and 374,454.54

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Solution

The fourth proportional to 660,879.90, 912,012 and 374,454.54 is: 516,745.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,879.90 : 912,012 = 374,454.54 : x
  2. Step 2: Convert to fraction form
    660,879.90/912,012 = 374,454.54/x
  3. Step 3: Cross multiply
    660,879.90x = 912,012 × 374,454.54
  4. Step 4: Simplify right side
    660,879.90x = 341,507,033,934.48
  5. Step 5: Solve for x
    x = 341,507,033,934.48/660,879.90
  6. Step 6: Final answer
    x = 516,745.98

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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.