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Finding the Fourth Proportional to 558,188.36, 770,276.70 and 316,487.28

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Solution

The fourth proportional to 558,188.36, 770,276.70 and 316,487.28 is: 436,739.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,188.36 : 770,276.70 = 316,487.28 : x
  2. Step 2: Convert to fraction form
    558,188.36/770,276.70 = 316,487.28/x
  3. Step 3: Cross multiply
    558,188.36x = 770,276.70 × 316,487.28
  4. Step 4: Simplify right side
    558,188.36x = 243,782,777,630.38
  5. Step 5: Solve for x
    x = 243,782,777,630.38/558,188.36
  6. Step 6: Final answer
    x = 436,739.27

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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.