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Finding the Fourth Proportional to 565,219.90, 780,003.21 and 310,587.49

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Solution

The fourth proportional to 565,219.90, 780,003.21 and 310,587.49 is: 428,610.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,219.90 : 780,003.21 = 310,587.49 : x
  2. Step 2: Convert to fraction form
    565,219.90/780,003.21 = 310,587.49/x
  3. Step 3: Cross multiply
    565,219.90x = 780,003.21 × 310,587.49
  4. Step 4: Simplify right side
    565,219.90x = 242,259,239,185.84
  5. Step 5: Solve for x
    x = 242,259,239,185.84/565,219.90
  6. Step 6: Final answer
    x = 428,610.60

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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.