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Finding the Fourth Proportional to 399,439.80, 599,159.70 and 310,210.20

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Solution

The fourth proportional to 399,439.80, 599,159.70 and 310,210.20 is: 465,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,439.80 : 599,159.70 = 310,210.20 : x
  2. Step 2: Convert to fraction form
    399,439.80/599,159.70 = 310,210.20/x
  3. Step 3: Cross multiply
    399,439.80x = 599,159.70 × 310,210.20
  4. Step 4: Simplify right side
    399,439.80x = 185,865,450,368.94
  5. Step 5: Solve for x
    x = 185,865,450,368.94/399,439.80
  6. Step 6: Final answer
    x = 465,315.30

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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.