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Finding the Fourth Proportional to 259,848.40, 390,064.20 and 200,945.20

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Solution

The fourth proportional to 259,848.40, 390,064.20 and 200,945.20 is: 301,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,848.40 : 390,064.20 = 200,945.20 : x
  2. Step 2: Convert to fraction form
    259,848.40/390,064.20 = 200,945.20/x
  3. Step 3: Cross multiply
    259,848.40x = 390,064.20 × 200,945.20
  4. Step 4: Simplify right side
    259,848.40x = 78,381,528,681.84
  5. Step 5: Solve for x
    x = 78,381,528,681.84/259,848.40
  6. Step 6: Final answer
    x = 301,643.30

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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.