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Finding the Fourth Proportional to 665,177.86, 917,946.30 and 378,697.93

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Solution

The fourth proportional to 665,177.86, 917,946.30 and 378,697.93 is: 522,603.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,177.86 : 917,946.30 = 378,697.93 : x
  2. Step 2: Convert to fraction form
    665,177.86/917,946.30 = 378,697.93/x
  3. Step 3: Cross multiply
    665,177.86x = 917,946.30 × 378,697.93
  4. Step 4: Simplify right side
    665,177.86x = 347,624,363,661.16
  5. Step 5: Solve for x
    x = 347,624,363,661.16/665,177.86
  6. Step 6: Final answer
    x = 522,603.63

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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.