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Finding the Fourth Proportional to 620,853.57, 856,848.98 and 345,238.94

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Solution

The fourth proportional to 620,853.57, 856,848.98 and 345,238.94 is: 476,469.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,853.57 : 856,848.98 = 345,238.94 : x
  2. Step 2: Convert to fraction form
    620,853.57/856,848.98 = 345,238.94/x
  3. Step 3: Cross multiply
    620,853.57x = 856,848.98 × 345,238.94
  4. Step 4: Simplify right side
    620,853.57x = 295,817,634,011.21
  5. Step 5: Solve for x
    x = 295,817,634,011.21/620,853.57
  6. Step 6: Final answer
    x = 476,469.25

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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.