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Finding the Fourth Proportional to 287,266.60, 430,899.90 and 259,710.40

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Solution

The fourth proportional to 287,266.60, 430,899.90 and 259,710.40 is: 389,565.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,266.60 : 430,899.90 = 259,710.40 : x
  2. Step 2: Convert to fraction form
    287,266.60/430,899.90 = 259,710.40/x
  3. Step 3: Cross multiply
    287,266.60x = 430,899.90 × 259,710.40
  4. Step 4: Simplify right side
    287,266.60x = 111,909,185,388.96
  5. Step 5: Solve for x
    x = 111,909,185,388.96/287,266.60
  6. Step 6: Final answer
    x = 389,565.60

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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.