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Finding the Fourth Proportional to 287,881.60, 431,692.80 and 130,028.80

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Solution

The fourth proportional to 287,881.60, 431,692.80 and 130,028.80 is: 194,984.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,881.60 : 431,692.80 = 130,028.80 : x
  2. Step 2: Convert to fraction form
    287,881.60/431,692.80 = 130,028.80/x
  3. Step 3: Cross multiply
    287,881.60x = 431,692.80 × 130,028.80
  4. Step 4: Simplify right side
    287,881.60x = 56,132,496,752.64
  5. Step 5: Solve for x
    x = 56,132,496,752.64/287,881.60
  6. Step 6: Final answer
    x = 194,984.66

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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.