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Finding the Fourth Proportional to 290,405.80, 435,090.30 and 245,823.40

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Solution

The fourth proportional to 290,405.80, 435,090.30 and 245,823.40 is: 368,296.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,405.80 : 435,090.30 = 245,823.40 : x
  2. Step 2: Convert to fraction form
    290,405.80/435,090.30 = 245,823.40/x
  3. Step 3: Cross multiply
    290,405.80x = 435,090.30 × 245,823.40
  4. Step 4: Simplify right side
    290,405.80x = 106,955,376,853.02
  5. Step 5: Solve for x
    x = 106,955,376,853.02/290,405.80
  6. Step 6: Final answer
    x = 368,296.28

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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.