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Finding the Fourth Proportional to 860,959,683.20, 1,207,639,381.60 and 860,959,683.20

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Solution

The fourth proportional to 860,959,683.20, 1,207,639,381.60 and 860,959,683.20 is: 1,207,639,381.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,959,683.20 : 1,207,639,381.60 = 860,959,683.20 : x
  2. Step 2: Convert to fraction form
    860,959,683.20/1,207,639,381.60 = 860,959,683.20/x
  3. Step 3: Cross multiply
    860,959,683.20x = 1,207,639,381.60 × 860,959,683.20
  4. Step 4: Simplify right side
    860,959,683.20x = 1,039,728,819,402,179,840
  5. Step 5: Solve for x
    x = 1,039,728,819,402,179,840/860,959,683.20
  6. Step 6: Final answer
    x = 1,207,639,381.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.