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Finding the Fourth Proportional to 578,753.55, 798,661.35 and 320,619.92

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Solution

The fourth proportional to 578,753.55, 798,661.35 and 320,619.92 is: 442,445.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,753.55 : 798,661.35 = 320,619.92 : x
  2. Step 2: Convert to fraction form
    578,753.55/798,661.35 = 320,619.92/x
  3. Step 3: Cross multiply
    578,753.55x = 798,661.35 × 320,619.92
  4. Step 4: Simplify right side
    578,753.55x = 256,066,734,150.79
  5. Step 5: Solve for x
    x = 256,066,734,150.79/578,753.55
  6. Step 6: Final answer
    x = 442,445.21

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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.