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Finding the Fourth Proportional to 405,062.40, 607,520.70 and 255,034.20

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Solution

The fourth proportional to 405,062.40, 607,520.70 and 255,034.20 is: 382,505.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,062.40 : 607,520.70 = 255,034.20 : x
  2. Step 2: Convert to fraction form
    405,062.40/607,520.70 = 255,034.20/x
  3. Step 3: Cross multiply
    405,062.40x = 607,520.70 × 255,034.20
  4. Step 4: Simplify right side
    405,062.40x = 154,938,555,707.94
  5. Step 5: Solve for x
    x = 154,938,555,707.94/405,062.40
  6. Step 6: Final answer
    x = 382,505.40

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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.