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Finding the Fourth Proportional to 539,239.40, 808,859.10 and 455,258.60

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Solution

The fourth proportional to 539,239.40, 808,859.10 and 455,258.60 is: 682,887.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,239.40 : 808,859.10 = 455,258.60 : x
  2. Step 2: Convert to fraction form
    539,239.40/808,859.10 = 455,258.60/x
  3. Step 3: Cross multiply
    539,239.40x = 808,859.10 × 455,258.60
  4. Step 4: Simplify right side
    539,239.40x = 368,240,061,463.26
  5. Step 5: Solve for x
    x = 368,240,061,463.26/539,239.40
  6. Step 6: Final answer
    x = 682,887.90

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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.