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Finding the Fourth Proportional to 405,400.72, 605,132.48 and 357,518.80

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Solution

The fourth proportional to 405,400.72, 605,132.48 and 357,518.80 is: 533,660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,400.72 : 605,132.48 = 357,518.80 : x
  2. Step 2: Convert to fraction form
    405,400.72/605,132.48 = 357,518.80/x
  3. Step 3: Cross multiply
    405,400.72x = 605,132.48 × 357,518.80
  4. Step 4: Simplify right side
    405,400.72x = 216,346,238,090.62
  5. Step 5: Solve for x
    x = 216,346,238,090.62/405,400.72
  6. Step 6: Final answer
    x = 533,660.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.