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Finding the Fourth Proportional to 643,507.80, 888,040.88 and 357,027.20

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Solution

The fourth proportional to 643,507.80, 888,040.88 and 357,027.20 is: 492,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,507.80 : 888,040.88 = 357,027.20 : x
  2. Step 2: Convert to fraction form
    643,507.80/888,040.88 = 357,027.20/x
  3. Step 3: Cross multiply
    643,507.80x = 888,040.88 × 357,027.20
  4. Step 4: Simplify right side
    643,507.80x = 317,054,749,306.90
  5. Step 5: Solve for x
    x = 317,054,749,306.90/643,507.80
  6. Step 6: Final answer
    x = 492,697.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.