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Finding the Fourth Proportional to 774,178,246.72, 1,068,364,110 and 421,757,133.40

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Solution

The fourth proportional to 774,178,246.72, 1,068,364,110 and 421,757,133.40 is: 582,023,825.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    774,178,246.72 : 1,068,364,110 = 421,757,133.40 : x
  2. Step 2: Convert to fraction form
    774,178,246.72/1,068,364,110 = 421,757,133.40/x
  3. Step 3: Cross multiply
    774,178,246.72x = 1,068,364,110 × 421,757,133.40
  4. Step 4: Simplify right side
    774,178,246.72x = 450,590,184,461,042,240
  5. Step 5: Solve for x
    x = 450,590,184,461,042,240/774,178,246.72
  6. Step 6: Final answer
    x = 582,023,825.09

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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.