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Finding the Fourth Proportional to 450,243, 621,354.78 and 249,039

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Solution

The fourth proportional to 450,243, 621,354.78 and 249,039 is: 343,684.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,243 : 621,354.78 = 249,039 : x
  2. Step 2: Convert to fraction form
    450,243/621,354.78 = 249,039/x
  3. Step 3: Cross multiply
    450,243x = 621,354.78 × 249,039
  4. Step 4: Simplify right side
    450,243x = 154,741,573,056.42
  5. Step 5: Solve for x
    x = 154,741,573,056.42/450,243
  6. Step 6: Final answer
    x = 343,684.57

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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.