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Finding the Fourth Proportional to 638,607,942.30, 957,911,913.45 and 638,607,942.30

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Solution

The fourth proportional to 638,607,942.30, 957,911,913.45 and 638,607,942.30 is: 957,911,913.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,607,942.30 : 957,911,913.45 = 638,607,942.30 : x
  2. Step 2: Convert to fraction form
    638,607,942.30/957,911,913.45 = 638,607,942.30/x
  3. Step 3: Cross multiply
    638,607,942.30x = 957,911,913.45 × 638,607,942.30
  4. Step 4: Simplify right side
    638,607,942.30x = 611,730,155,952,960,128
  5. Step 5: Solve for x
    x = 611,730,155,952,960,128/638,607,942.30
  6. Step 6: Final answer
    x = 957,911,913.45

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Double scale
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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.