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Finding the Fourth Proportional to 405,068.40, 607,529.70 and 255,040.20

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Solution

The fourth proportional to 405,068.40, 607,529.70 and 255,040.20 is: 382,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,068.40 : 607,529.70 = 255,040.20 : x
  2. Step 2: Convert to fraction form
    405,068.40/607,529.70 = 255,040.20/x
  3. Step 3: Cross multiply
    405,068.40x = 607,529.70 × 255,040.20
  4. Step 4: Simplify right side
    405,068.40x = 154,944,496,193.94
  5. Step 5: Solve for x
    x = 154,944,496,193.94/405,068.40
  6. Step 6: Final answer
    x = 382,514.40

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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.