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Finding the Fourth Proportional to 287,267.76, 429,533.64 and 262,171.80

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Solution

The fourth proportional to 287,267.76, 429,533.64 and 262,171.80 is: 392,009.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,267.76 : 429,533.64 = 262,171.80 : x
  2. Step 2: Convert to fraction form
    287,267.76/429,533.64 = 262,171.80/x
  3. Step 3: Cross multiply
    287,267.76x = 429,533.64 × 262,171.80
  4. Step 4: Simplify right side
    287,267.76x = 112,611,607,559.35
  5. Step 5: Solve for x
    x = 112,611,607,559.35/287,267.76
  6. Step 6: Final answer
    x = 392,009.21

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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.