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Finding the Fourth Proportional to 942,978.60, 1,413,342.78 and 657,120.68

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Solution

The fourth proportional to 942,978.60, 1,413,342.78 and 657,120.68 is: 984,896.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    942,978.60 : 1,413,342.78 = 657,120.68 : x
  2. Step 2: Convert to fraction form
    942,978.60/1,413,342.78 = 657,120.68/x
  3. Step 3: Cross multiply
    942,978.60x = 1,413,342.78 × 657,120.68
  4. Step 4: Simplify right side
    942,978.60x = 928,736,768,666.69
  5. Step 5: Solve for x
    x = 928,736,768,666.69/942,978.60
  6. Step 6: Final answer
    x = 984,896.97

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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.