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Finding the Fourth Proportional to 869,007.80, 1,303,511.70 and 307,969.40

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Solution

The fourth proportional to 869,007.80, 1,303,511.70 and 307,969.40 is: 461,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,007.80 : 1,303,511.70 = 307,969.40 : x
  2. Step 2: Convert to fraction form
    869,007.80/1,303,511.70 = 307,969.40/x
  3. Step 3: Cross multiply
    869,007.80x = 1,303,511.70 × 307,969.40
  4. Step 4: Simplify right side
    869,007.80x = 401,441,716,141.98
  5. Step 5: Solve for x
    x = 401,441,716,141.98/869,007.80
  6. Step 6: Final answer
    x = 461,954.10

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Similar ratio
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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.