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Finding the Fourth Proportional to 873,176.40, 1,309,505.40 and 340,390.80

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Solution

The fourth proportional to 873,176.40, 1,309,505.40 and 340,390.80 is: 510,485.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,176.40 : 1,309,505.40 = 340,390.80 : x
  2. Step 2: Convert to fraction form
    873,176.40/1,309,505.40 = 340,390.80/x
  3. Step 3: Cross multiply
    873,176.40x = 1,309,505.40 × 340,390.80
  4. Step 4: Simplify right side
    873,176.40x = 445,743,590,710.32
  5. Step 5: Solve for x
    x = 445,743,590,710.32/873,176.40
  6. Step 6: Final answer
    x = 510,485.16

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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.