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Finding the Fourth Proportional to 520,643.80, 780,771.30 and 362,402.20

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Solution

The fourth proportional to 520,643.80, 780,771.30 and 362,402.20 is: 543,467.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,643.80 : 780,771.30 = 362,402.20 : x
  2. Step 2: Convert to fraction form
    520,643.80/780,771.30 = 362,402.20/x
  3. Step 3: Cross multiply
    520,643.80x = 780,771.30 × 362,402.20
  4. Step 4: Simplify right side
    520,643.80x = 282,953,236,816.86
  5. Step 5: Solve for x
    x = 282,953,236,816.86/520,643.80
  6. Step 6: Final answer
    x = 543,467.98

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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.