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Finding the Fourth Proportional to 450,490, 621,695.64 and 249,286

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Solution

The fourth proportional to 450,490, 621,695.64 and 249,286 is: 344,025.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,490 : 621,695.64 = 249,286 : x
  2. Step 2: Convert to fraction form
    450,490/621,695.64 = 249,286/x
  3. Step 3: Cross multiply
    450,490x = 621,695.64 × 249,286
  4. Step 4: Simplify right side
    450,490x = 154,980,019,313.04
  5. Step 5: Solve for x
    x = 154,980,019,313.04/450,490
  6. Step 6: Final answer
    x = 344,025.44

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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.