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Finding the Fourth Proportional to 1,278,756,400.80, 1,792,072,946.40 and 1,278,756,400.80

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Solution

The fourth proportional to 1,278,756,400.80, 1,792,072,946.40 and 1,278,756,400.80 is: 1,792,072,946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,756,400.80 : 1,792,072,946.40 = 1,278,756,400.80 : x
  2. Step 2: Convert to fraction form
    1,278,756,400.80/1,792,072,946.40 = 1,278,756,400.80/x
  3. Step 3: Cross multiply
    1,278,756,400.80x = 1,792,072,946.40 × 1,278,756,400.80
  4. Step 4: Simplify right side
    1,278,756,400.80x = 2,291,624,750,909,515,264
  5. Step 5: Solve for x
    x = 2,291,624,750,909,515,264/1,278,756,400.80
  6. Step 6: Final answer
    x = 1,792,072,946.40

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Double scale
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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.