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Finding the Fourth Proportional to 1,424,602.93, 1,965,944.86 and 780,011.41

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Solution

The fourth proportional to 1,424,602.93, 1,965,944.86 and 780,011.41 is: 1,076,411.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424,602.93 : 1,965,944.86 = 780,011.41 : x
  2. Step 2: Convert to fraction form
    1,424,602.93/1,965,944.86 = 780,011.41/x
  3. Step 3: Cross multiply
    1,424,602.93x = 1,965,944.86 × 780,011.41
  4. Step 4: Simplify right side
    1,424,602.93x = 1,533,459,422,230.85
  5. Step 5: Solve for x
    x = 1,533,459,422,230.85/1,424,602.93
  6. Step 6: Final answer
    x = 1,076,411.81

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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.