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Finding the Fourth Proportional to 535,128.40, 802,692.60 and 486,139.60

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Solution

The fourth proportional to 535,128.40, 802,692.60 and 486,139.60 is: 729,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,128.40 : 802,692.60 = 486,139.60 : x
  2. Step 2: Convert to fraction form
    535,128.40/802,692.60 = 486,139.60/x
  3. Step 3: Cross multiply
    535,128.40x = 802,692.60 × 486,139.60
  4. Step 4: Simplify right side
    535,128.40x = 390,220,659,486.96
  5. Step 5: Solve for x
    x = 390,220,659,486.96/535,128.40
  6. Step 6: Final answer
    x = 729,209.40

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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.