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Finding the Fourth Proportional to 1,405,364.06, 1,939,400.16 and 760,784.08

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Solution

The fourth proportional to 1,405,364.06, 1,939,400.16 and 760,784.08 is: 1,049,880.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,364.06 : 1,939,400.16 = 760,784.08 : x
  2. Step 2: Convert to fraction form
    1,405,364.06/1,939,400.16 = 760,784.08/x
  3. Step 3: Cross multiply
    1,405,364.06x = 1,939,400.16 × 760,784.08
  4. Step 4: Simplify right side
    1,405,364.06x = 1,475,464,766,477.45
  5. Step 5: Solve for x
    x = 1,475,464,766,477.45/1,405,364.06
  6. Step 6: Final answer
    x = 1,049,880.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.