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Finding the Fourth Proportional to 405,113.37, 607,699.62 and 138,871.65

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Solution

The fourth proportional to 405,113.37, 607,699.62 and 138,871.65 is: 208,317.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,113.37 : 607,699.62 = 138,871.65 : x
  2. Step 2: Convert to fraction form
    405,113.37/607,699.62 = 138,871.65/x
  3. Step 3: Cross multiply
    405,113.37x = 607,699.62 × 138,871.65
  4. Step 4: Simplify right side
    405,113.37x = 84,392,248,933.77
  5. Step 5: Solve for x
    x = 84,392,248,933.77/405,113.37
  6. Step 6: Final answer
    x = 208,317.61

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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.