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Finding the Fourth Proportional to 1,368,636,962.50, 1,888,756,145.94 and 774,010,366.75

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Solution

The fourth proportional to 1,368,636,962.50, 1,888,756,145.94 and 774,010,366.75 is: 1,068,155,308.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368,636,962.50 : 1,888,756,145.94 = 774,010,366.75 : x
  2. Step 2: Convert to fraction form
    1,368,636,962.50/1,888,756,145.94 = 774,010,366.75/x
  3. Step 3: Cross multiply
    1,368,636,962.50x = 1,888,756,145.94 × 774,010,366.75
  4. Step 4: Simplify right side
    1,368,636,962.50x = 1,461,916,837,220,335,872
  5. Step 5: Solve for x
    x = 1,461,916,837,220,335,872/1,368,636,962.50
  6. Step 6: Final answer
    x = 1,068,155,308.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.