Home / 679,461.20-1,019,969.40-399,136.40

Finding the Fourth Proportional to 679,461.20, 1,019,969.40 and 399,136.40

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Solution

The fourth proportional to 679,461.20, 1,019,969.40 and 399,136.40 is: 599,161.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,461.20 : 1,019,969.40 = 399,136.40 : x
  2. Step 2: Convert to fraction form
    679,461.20/1,019,969.40 = 399,136.40/x
  3. Step 3: Cross multiply
    679,461.20x = 1,019,969.40 × 399,136.40
  4. Step 4: Simplify right side
    679,461.20x = 407,106,914,426.16
  5. Step 5: Solve for x
    x = 407,106,914,426.16/679,461.20
  6. Step 6: Final answer
    x = 599,161.39

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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.