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Finding the Fourth Proportional to 385,004.80, 577,507.20 and 345,638.80

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Solution

The fourth proportional to 385,004.80, 577,507.20 and 345,638.80 is: 518,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,004.80 : 577,507.20 = 345,638.80 : x
  2. Step 2: Convert to fraction form
    385,004.80/577,507.20 = 345,638.80/x
  3. Step 3: Cross multiply
    385,004.80x = 577,507.20 × 345,638.80
  4. Step 4: Simplify right side
    385,004.80x = 199,608,895,599.36
  5. Step 5: Solve for x
    x = 199,608,895,599.36/385,004.80
  6. Step 6: Final answer
    x = 518,458.20

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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.