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Finding the Fourth Proportional to 405,073.80, 607,610.70 and 138,836.93

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Solution

The fourth proportional to 405,073.80, 607,610.70 and 138,836.93 is: 208,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,073.80 : 607,610.70 = 138,836.93 : x
  2. Step 2: Convert to fraction form
    405,073.80/607,610.70 = 138,836.93/x
  3. Step 3: Cross multiply
    405,073.80x = 607,610.70 × 138,836.93
  4. Step 4: Simplify right side
    405,073.80x = 84,358,804,223.15
  5. Step 5: Solve for x
    x = 84,358,804,223.15/405,073.80
  6. Step 6: Final answer
    x = 208,255.40

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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.