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Finding the Fourth Proportional to 912,383.40, 1,368,866.70 and 313,728.60

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Solution

The fourth proportional to 912,383.40, 1,368,866.70 and 313,728.60 is: 470,693.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,383.40 : 1,368,866.70 = 313,728.60 : x
  2. Step 2: Convert to fraction form
    912,383.40/1,368,866.70 = 313,728.60/x
  3. Step 3: Cross multiply
    912,383.40x = 1,368,866.70 × 313,728.60
  4. Step 4: Simplify right side
    912,383.40x = 429,452,633,377.62
  5. Step 5: Solve for x
    x = 429,452,633,377.62/912,383.40
  6. Step 6: Final answer
    x = 470,693.17

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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.