Home / 1,398,438,875.07-1,929,845,839.68-771,907,435.83

Finding the Fourth Proportional to 1,398,438,875.07, 1,929,845,839.68 and 771,907,435.83

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Solution

The fourth proportional to 1,398,438,875.07, 1,929,845,839.68 and 771,907,435.83 is: 1,065,232,367.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,438,875.07 : 1,929,845,839.68 = 771,907,435.83 : x
  2. Step 2: Convert to fraction form
    1,398,438,875.07/1,929,845,839.68 = 771,907,435.83/x
  3. Step 3: Cross multiply
    1,398,438,875.07x = 1,929,845,839.68 × 771,907,435.83
  4. Step 4: Simplify right side
    1,398,438,875.07x = 1,489,662,353,654,582,272
  5. Step 5: Solve for x
    x = 1,489,662,353,654,582,272/1,398,438,875.07
  6. Step 6: Final answer
    x = 1,065,232,367.47

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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.