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Finding the Fourth Proportional to 1,261,128,290.85, 1,891,692,436.28 and 1,261,128,290.85

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Solution

The fourth proportional to 1,261,128,290.85, 1,891,692,436.28 and 1,261,128,290.85 is: 1,891,692,436.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,128,290.85 : 1,891,692,436.28 = 1,261,128,290.85 : x
  2. Step 2: Convert to fraction form
    1,261,128,290.85/1,891,692,436.28 = 1,261,128,290.85/x
  3. Step 3: Cross multiply
    1,261,128,290.85x = 1,891,692,436.28 × 1,261,128,290.85
  4. Step 4: Simplify right side
    1,261,128,290.85x = 2,385,666,848,973,363,200
  5. Step 5: Solve for x
    x = 2,385,666,848,973,363,200/1,261,128,290.85
  6. Step 6: Final answer
    x = 1,891,692,436.28

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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.