Home / 990,136.80-1,485,205.20-359,071.20

Finding the Fourth Proportional to 990,136.80, 1,485,205.20 and 359,071.20

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Solution

The fourth proportional to 990,136.80, 1,485,205.20 and 359,071.20 is: 538,606.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,136.80 : 1,485,205.20 = 359,071.20 : x
  2. Step 2: Convert to fraction form
    990,136.80/1,485,205.20 = 359,071.20/x
  3. Step 3: Cross multiply
    990,136.80x = 1,485,205.20 × 359,071.20
  4. Step 4: Simplify right side
    990,136.80x = 533,294,413,410.24
  5. Step 5: Solve for x
    x = 533,294,413,410.24/990,136.80
  6. Step 6: Final answer
    x = 538,606.80

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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.