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Finding the Fourth Proportional to 389,477.64, 580,944.12 and 353,599.92

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Solution

The fourth proportional to 389,477.64, 580,944.12 and 353,599.92 is: 527,428.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,477.64 : 580,944.12 = 353,599.92 : x
  2. Step 2: Convert to fraction form
    389,477.64/580,944.12 = 353,599.92/x
  3. Step 3: Cross multiply
    389,477.64x = 580,944.12 × 353,599.92
  4. Step 4: Simplify right side
    389,477.64x = 205,421,794,356.47
  5. Step 5: Solve for x
    x = 205,421,794,356.47/389,477.64
  6. Step 6: Final answer
    x = 527,428.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.