Home / 1,405,215,086.40-1,939,208,204.88-778,693,979.52

Finding the Fourth Proportional to 1,405,215,086.40, 1,939,208,204.88 and 778,693,979.52

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Solution

The fourth proportional to 1,405,215,086.40, 1,939,208,204.88 and 778,693,979.52 is: 1,074,604,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,215,086.40 : 1,939,208,204.88 = 778,693,979.52 : x
  2. Step 2: Convert to fraction form
    1,405,215,086.40/1,939,208,204.88 = 778,693,979.52/x
  3. Step 3: Cross multiply
    1,405,215,086.40x = 1,939,208,204.88 × 778,693,979.52
  4. Step 4: Simplify right side
    1,405,215,086.40x = 1,510,049,754,175,842,816
  5. Step 5: Solve for x
    x = 1,510,049,754,175,842,816/1,405,215,086.40
  6. Step 6: Final answer
    x = 1,074,604,001.05

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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.