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Finding the Fourth Proportional to 1,285,394.40, 1,926,248.40 and 945,784.80

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Solution

The fourth proportional to 1,285,394.40, 1,926,248.40 and 945,784.80 is: 1,417,320.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,394.40 : 1,926,248.40 = 945,784.80 : x
  2. Step 2: Convert to fraction form
    1,285,394.40/1,926,248.40 = 945,784.80/x
  3. Step 3: Cross multiply
    1,285,394.40x = 1,926,248.40 × 945,784.80
  4. Step 4: Simplify right side
    1,285,394.40x = 1,821,816,457,744.32
  5. Step 5: Solve for x
    x = 1,821,816,457,744.32/1,285,394.40
  6. Step 6: Final answer
    x = 1,417,320.99

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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.