Home / 853,804.80-1,280,318.40-380,246.40

Finding the Fourth Proportional to 853,804.80, 1,280,318.40 and 380,246.40

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Solution

The fourth proportional to 853,804.80, 1,280,318.40 and 380,246.40 is: 570,196.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,804.80 : 1,280,318.40 = 380,246.40 : x
  2. Step 2: Convert to fraction form
    853,804.80/1,280,318.40 = 380,246.40/x
  3. Step 3: Cross multiply
    853,804.80x = 1,280,318.40 × 380,246.40
  4. Step 4: Simplify right side
    853,804.80x = 486,836,462,453.76
  5. Step 5: Solve for x
    x = 486,836,462,453.76/853,804.80
  6. Step 6: Final answer
    x = 570,196.45

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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.