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Finding the Fourth Proportional to 405,242.72, 607,320.68 and 315,393.90

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Solution

The fourth proportional to 405,242.72, 607,320.68 and 315,393.90 is: 472,667.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,242.72 : 607,320.68 = 315,393.90 : x
  2. Step 2: Convert to fraction form
    405,242.72/607,320.68 = 315,393.90/x
  3. Step 3: Cross multiply
    405,242.72x = 607,320.68 × 315,393.90
  4. Step 4: Simplify right side
    405,242.72x = 191,545,237,815.85
  5. Step 5: Solve for x
    x = 191,545,237,815.85/405,242.72
  6. Step 6: Final answer
    x = 472,667.93

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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.