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Finding the Fourth Proportional to 1,668,591,925.94, 2,301,609,462.68 and 989,928,394.40

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Solution

The fourth proportional to 1,668,591,925.94, 2,301,609,462.68 and 989,928,394.40 is: 1,365,479,794.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668,591,925.94 : 2,301,609,462.68 = 989,928,394.40 : x
  2. Step 2: Convert to fraction form
    1,668,591,925.94/2,301,609,462.68 = 989,928,394.40/x
  3. Step 3: Cross multiply
    1,668,591,925.94x = 2,301,609,462.68 × 989,928,394.40
  4. Step 4: Simplify right side
    1,668,591,925.94x = 2,278,428,559,926,256,640
  5. Step 5: Solve for x
    x = 2,278,428,559,926,256,640/1,668,591,925.94
  6. Step 6: Final answer
    x = 1,365,479,794.38

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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.