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Finding the Fourth Proportional to 662,661,200.80, 993,991,801.20 and 478,995,191.20

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Solution

The fourth proportional to 662,661,200.80, 993,991,801.20 and 478,995,191.20 is: 718,492,786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,661,200.80 : 993,991,801.20 = 478,995,191.20 : x
  2. Step 2: Convert to fraction form
    662,661,200.80/993,991,801.20 = 478,995,191.20/x
  3. Step 3: Cross multiply
    662,661,200.80x = 993,991,801.20 × 478,995,191.20
  4. Step 4: Simplify right side
    662,661,200.80x = 476,117,292,867,026,432
  5. Step 5: Solve for x
    x = 476,117,292,867,026,432/662,661,200.80
  6. Step 6: Final answer
    x = 718,492,786.80

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1.5x scale

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.