Home / 990,074.80-1,484,820.60-390,836.80

Finding the Fourth Proportional to 990,074.80, 1,484,820.60 and 390,836.80

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Solution

The fourth proportional to 990,074.80, 1,484,820.60 and 390,836.80 is: 586,140.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,074.80 : 1,484,820.60 = 390,836.80 : x
  2. Step 2: Convert to fraction form
    990,074.80/1,484,820.60 = 390,836.80/x
  3. Step 3: Cross multiply
    990,074.80x = 1,484,820.60 × 390,836.80
  4. Step 4: Simplify right side
    990,074.80x = 580,322,531,878.08
  5. Step 5: Solve for x
    x = 580,322,531,878.08/990,074.80
  6. Step 6: Final answer
    x = 586,140.09

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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.