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Finding the Fourth Proportional to 389,304.80, 537,240.40 and 210,456.80

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Solution

The fourth proportional to 389,304.80, 537,240.40 and 210,456.80 is: 290,430.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,304.80 : 537,240.40 = 210,456.80 : x
  2. Step 2: Convert to fraction form
    389,304.80/537,240.40 = 210,456.80/x
  3. Step 3: Cross multiply
    389,304.80x = 537,240.40 × 210,456.80
  4. Step 4: Simplify right side
    389,304.80x = 113,065,895,414.72
  5. Step 5: Solve for x
    x = 113,065,895,414.72/389,304.80
  6. Step 6: Final answer
    x = 290,430.26

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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.