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Finding the Fourth Proportional to 450,478, 621,664.12 and 249,278.32

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Solution

The fourth proportional to 450,478, 621,664.12 and 249,278.32 is: 344,006.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,478 : 621,664.12 = 249,278.32 : x
  2. Step 2: Convert to fraction form
    450,478/621,664.12 = 249,278.32/x
  3. Step 3: Cross multiply
    450,478x = 621,664.12 × 249,278.32
  4. Step 4: Simplify right side
    450,478x = 154,967,387,437.88
  5. Step 5: Solve for x
    x = 154,967,387,437.88/450,478
  6. Step 6: Final answer
    x = 344,006.56

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1.5x scale

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.