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Finding the Fourth Proportional to 399,666.80, 599,500.20 and 310,437.20

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Solution

The fourth proportional to 399,666.80, 599,500.20 and 310,437.20 is: 465,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,666.80 : 599,500.20 = 310,437.20 : x
  2. Step 2: Convert to fraction form
    399,666.80/599,500.20 = 310,437.20/x
  3. Step 3: Cross multiply
    399,666.80x = 599,500.20 × 310,437.20
  4. Step 4: Simplify right side
    399,666.80x = 186,107,163,487.44
  5. Step 5: Solve for x
    x = 186,107,163,487.44/399,666.80
  6. Step 6: Final answer
    x = 465,655.80

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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.