Home / 678,216.36-935,904.72-391,719.36

Finding the Fourth Proportional to 678,216.36, 935,904.72 and 391,719.36

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Solution

The fourth proportional to 678,216.36, 935,904.72 and 391,719.36 is: 540,553.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,216.36 : 935,904.72 = 391,719.36 : x
  2. Step 2: Convert to fraction form
    678,216.36/935,904.72 = 391,719.36/x
  3. Step 3: Cross multiply
    678,216.36x = 935,904.72 × 391,719.36
  4. Step 4: Simplify right side
    678,216.36x = 366,611,997,939.38
  5. Step 5: Solve for x
    x = 366,611,997,939.38/678,216.36
  6. Step 6: Final answer
    x = 540,553.16

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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.