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Finding the Fourth Proportional to 389,612.40, 584,437.80 and 202,988.40

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Solution

The fourth proportional to 389,612.40, 584,437.80 and 202,988.40 is: 304,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,612.40 : 584,437.80 = 202,988.40 : x
  2. Step 2: Convert to fraction form
    389,612.40/584,437.80 = 202,988.40/x
  3. Step 3: Cross multiply
    389,612.40x = 584,437.80 × 202,988.40
  4. Step 4: Simplify right side
    389,612.40x = 118,634,093,921.52
  5. Step 5: Solve for x
    x = 118,634,093,921.52/389,612.40
  6. Step 6: Final answer
    x = 304,492.60

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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.