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Finding the Fourth Proportional to 539,373, 809,052.90 and 139,978.20

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Solution

The fourth proportional to 539,373, 809,052.90 and 139,978.20 is: 209,965.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,373 : 809,052.90 = 139,978.20 : x
  2. Step 2: Convert to fraction form
    539,373/809,052.90 = 139,978.20/x
  3. Step 3: Cross multiply
    539,373x = 809,052.90 × 139,978.20
  4. Step 4: Simplify right side
    539,373x = 113,249,768,646.78
  5. Step 5: Solve for x
    x = 113,249,768,646.78/539,373
  6. Step 6: Final answer
    x = 209,965.59

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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.