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Finding the Fourth Proportional to 389,611.80, 584,417.70 and 360,743.40

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Solution

The fourth proportional to 389,611.80, 584,417.70 and 360,743.40 is: 541,115.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,611.80 : 584,417.70 = 360,743.40 : x
  2. Step 2: Convert to fraction form
    389,611.80/584,417.70 = 360,743.40/x
  3. Step 3: Cross multiply
    389,611.80x = 584,417.70 × 360,743.40
  4. Step 4: Simplify right side
    389,611.80x = 210,824,828,118.18
  5. Step 5: Solve for x
    x = 210,824,828,118.18/389,611.80
  6. Step 6: Final answer
    x = 541,115.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.