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Finding the Fourth Proportional to 421,430.85, 581,509.33 and 240,150.42

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Solution

The fourth proportional to 421,430.85, 581,509.33 and 240,150.42 is: 331,370.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,430.85 : 581,509.33 = 240,150.42 : x
  2. Step 2: Convert to fraction form
    421,430.85/581,509.33 = 240,150.42/x
  3. Step 3: Cross multiply
    421,430.85x = 581,509.33 × 240,150.42
  4. Step 4: Simplify right side
    421,430.85x = 139,649,709,233.04
  5. Step 5: Solve for x
    x = 139,649,709,233.04/421,430.85
  6. Step 6: Final answer
    x = 331,370.40

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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.