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Finding the Fourth Proportional to 808,640,891.10, 1,212,961,336.65 and 776,896,148.70

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Solution

The fourth proportional to 808,640,891.10, 1,212,961,336.65 and 776,896,148.70 is: 1,165,344,223.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,640,891.10 : 1,212,961,336.65 = 776,896,148.70 : x
  2. Step 2: Convert to fraction form
    808,640,891.10/1,212,961,336.65 = 776,896,148.70/x
  3. Step 3: Cross multiply
    808,640,891.10x = 1,212,961,336.65 × 776,896,148.70
  4. Step 4: Simplify right side
    808,640,891.10x = 942,344,990,965,389,312
  5. Step 5: Solve for x
    x = 942,344,990,965,389,312/808,640,891.10
  6. Step 6: Final answer
    x = 1,165,344,223.05

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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.