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Finding the Fourth Proportional to 661,689,128.40, 992,533,692.60 and 201,626,559.60

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Solution

The fourth proportional to 661,689,128.40, 992,533,692.60 and 201,626,559.60 is: 302,439,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,689,128.40 : 992,533,692.60 = 201,626,559.60 : x
  2. Step 2: Convert to fraction form
    661,689,128.40/992,533,692.60 = 201,626,559.60/x
  3. Step 3: Cross multiply
    661,689,128.40x = 992,533,692.60 × 201,626,559.60
  4. Step 4: Simplify right side
    661,689,128.40x = 200,121,153,726,021,984
  5. Step 5: Solve for x
    x = 200,121,153,726,021,984/661,689,128.40
  6. Step 6: Final answer
    x = 302,439,839.40

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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.