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Finding the Fourth Proportional to 405,138.60, 607,707.90 and 402,514.20

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Solution

The fourth proportional to 405,138.60, 607,707.90 and 402,514.20 is: 603,771.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,138.60 : 607,707.90 = 402,514.20 : x
  2. Step 2: Convert to fraction form
    405,138.60/607,707.90 = 402,514.20/x
  3. Step 3: Cross multiply
    405,138.60x = 607,707.90 × 402,514.20
  4. Step 4: Simplify right side
    405,138.60x = 244,611,059,202.18
  5. Step 5: Solve for x
    x = 244,611,059,202.18/405,138.60
  6. Step 6: Final answer
    x = 603,771.30

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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.