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Finding the Fourth Proportional to 869,491.36, 1,302,310 and 668,330.40

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Solution

The fourth proportional to 869,491.36, 1,302,310 and 668,330.40 is: 1,001,014.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,491.36 : 1,302,310 = 668,330.40 : x
  2. Step 2: Convert to fraction form
    869,491.36/1,302,310 = 668,330.40/x
  3. Step 3: Cross multiply
    869,491.36x = 1,302,310 × 668,330.40
  4. Step 4: Simplify right side
    869,491.36x = 870,373,363,224
  5. Step 5: Solve for x
    x = 870,373,363,224/869,491.36
  6. Step 6: Final answer
    x = 1,001,014.39

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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.