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Finding the Fourth Proportional to 1,398,438,876.07, 1,929,845,841.06 and 771,907,436.83

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Solution

The fourth proportional to 1,398,438,876.07, 1,929,845,841.06 and 771,907,436.83 is: 1,065,232,368.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,438,876.07 : 1,929,845,841.06 = 771,907,436.83 : x
  2. Step 2: Convert to fraction form
    1,398,438,876.07/1,929,845,841.06 = 771,907,436.83/x
  3. Step 3: Cross multiply
    1,398,438,876.07x = 1,929,845,841.06 × 771,907,436.83
  4. Step 4: Simplify right side
    1,398,438,876.07x = 1,489,662,356,649,660,160
  5. Step 5: Solve for x
    x = 1,489,662,356,649,660,160/1,398,438,876.07
  6. Step 6: Final answer
    x = 1,065,232,368.85

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Double scale
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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.