Home / 785,721.60-1,178,668.80-287,193.60

Finding the Fourth Proportional to 785,721.60, 1,178,668.80 and 287,193.60

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Solution

The fourth proportional to 785,721.60, 1,178,668.80 and 287,193.60 is: 430,821.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    785,721.60 : 1,178,668.80 = 287,193.60 : x
  2. Step 2: Convert to fraction form
    785,721.60/1,178,668.80 = 287,193.60/x
  3. Step 3: Cross multiply
    785,721.60x = 1,178,668.80 × 287,193.60
  4. Step 4: Simplify right side
    785,721.60x = 338,506,135,879.68
  5. Step 5: Solve for x
    x = 338,506,135,879.68/785,721.60
  6. Step 6: Final answer
    x = 430,821.98

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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.