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Finding the Fourth Proportional to 405,330.40, 607,995.60 and 124,811.20

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Solution

The fourth proportional to 405,330.40, 607,995.60 and 124,811.20 is: 187,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,330.40 : 607,995.60 = 124,811.20 : x
  2. Step 2: Convert to fraction form
    405,330.40/607,995.60 = 124,811.20/x
  3. Step 3: Cross multiply
    405,330.40x = 607,995.60 × 124,811.20
  4. Step 4: Simplify right side
    405,330.40x = 75,884,660,430.72
  5. Step 5: Solve for x
    x = 75,884,660,430.72/405,330.40
  6. Step 6: Final answer
    x = 187,216.80

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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.