Home / 385,128.40-577,692.60-118,865.20

Finding the Fourth Proportional to 385,128.40, 577,692.60 and 118,865.20

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Solution

The fourth proportional to 385,128.40, 577,692.60 and 118,865.20 is: 178,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,128.40 : 577,692.60 = 118,865.20 : x
  2. Step 2: Convert to fraction form
    385,128.40/577,692.60 = 118,865.20/x
  3. Step 3: Cross multiply
    385,128.40x = 577,692.60 × 118,865.20
  4. Step 4: Simplify right side
    385,128.40x = 68,667,546,437.52
  5. Step 5: Solve for x
    x = 68,667,546,437.52/385,128.40
  6. Step 6: Final answer
    x = 178,297.80

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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.