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Finding the Fourth Proportional to 642,568,971.87, 963,974,434.44 and 457,878,277.65

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Solution

The fourth proportional to 642,568,971.87, 963,974,434.44 and 457,878,277.65 is: 686,903,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,568,971.87 : 963,974,434.44 = 457,878,277.65 : x
  2. Step 2: Convert to fraction form
    642,568,971.87/963,974,434.44 = 457,878,277.65/x
  3. Step 3: Cross multiply
    642,568,971.87x = 963,974,434.44 × 457,878,277.65
  4. Step 4: Simplify right side
    642,568,971.87x = 441,382,953,740,020,032
  5. Step 5: Solve for x
    x = 441,382,953,740,020,032/642,568,971.87
  6. Step 6: Final answer
    x = 686,903,621.34

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Double scale
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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.