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Finding the Fourth Proportional to 613,648.20, 920,909.70 and 347,125.80

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Solution

The fourth proportional to 613,648.20, 920,909.70 and 347,125.80 is: 520,936.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,648.20 : 920,909.70 = 347,125.80 : x
  2. Step 2: Convert to fraction form
    613,648.20/920,909.70 = 347,125.80/x
  3. Step 3: Cross multiply
    613,648.20x = 920,909.70 × 347,125.80
  4. Step 4: Simplify right side
    613,648.20x = 319,671,516,340.26
  5. Step 5: Solve for x
    x = 319,671,516,340.26/613,648.20
  6. Step 6: Final answer
    x = 520,936.13

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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.