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Finding the Fourth Proportional to 405,010.80, 607,458.60 and 138,783.60

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Solution

The fourth proportional to 405,010.80, 607,458.60 and 138,783.60 is: 208,155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,010.80 : 607,458.60 = 138,783.60 : x
  2. Step 2: Convert to fraction form
    405,010.80/607,458.60 = 138,783.60/x
  3. Step 3: Cross multiply
    405,010.80x = 607,458.60 × 138,783.60
  4. Step 4: Simplify right side
    405,010.80x = 84,305,291,358.96
  5. Step 5: Solve for x
    x = 84,305,291,358.96/405,010.80
  6. Step 6: Final answer
    x = 208,155.66

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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.