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Finding the Fourth Proportional to 709,605.54, 1,064,878.41 and 389,980.62

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Solution

The fourth proportional to 709,605.54, 1,064,878.41 and 389,980.62 is: 585,229.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,605.54 : 1,064,878.41 = 389,980.62 : x
  2. Step 2: Convert to fraction form
    709,605.54/1,064,878.41 = 389,980.62/x
  3. Step 3: Cross multiply
    709,605.54x = 1,064,878.41 × 389,980.62
  4. Step 4: Simplify right side
    709,605.54x = 415,281,942,556.41
  5. Step 5: Solve for x
    x = 415,281,942,556.41/709,605.54
  6. Step 6: Final answer
    x = 585,229.28

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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.