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Finding the Fourth Proportional to 450,238.78, 621,330.78 and 249,034.78

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Solution

The fourth proportional to 450,238.78, 621,330.78 and 249,034.78 is: 343,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,238.78 : 621,330.78 = 249,034.78 : x
  2. Step 2: Convert to fraction form
    450,238.78/621,330.78 = 249,034.78/x
  3. Step 3: Cross multiply
    450,238.78x = 621,330.78 × 249,034.78
  4. Step 4: Simplify right side
    450,238.78x = 154,732,974,104.53
  5. Step 5: Solve for x
    x = 154,732,974,104.53/450,238.78
  6. Step 6: Final answer
    x = 343,668.70

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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.