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Finding the Fourth Proportional to 678,790.19, 936,700.17 and 407,008.10

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Solution

The fourth proportional to 678,790.19, 936,700.17 and 407,008.10 is: 561,653.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,790.19 : 936,700.17 = 407,008.10 : x
  2. Step 2: Convert to fraction form
    678,790.19/936,700.17 = 407,008.10/x
  3. Step 3: Cross multiply
    678,790.19x = 936,700.17 × 407,008.10
  4. Step 4: Simplify right side
    678,790.19x = 381,244,556,461.38
  5. Step 5: Solve for x
    x = 381,244,556,461.38/678,790.19
  6. Step 6: Final answer
    x = 561,653.01

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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.