Home / 678,777.10-936,657.75-392,315.74

Finding the Fourth Proportional to 678,777.10, 936,657.75 and 392,315.74

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Solution

The fourth proportional to 678,777.10, 936,657.75 and 392,315.74 is: 541,364.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,777.10 : 936,657.75 = 392,315.74 : x
  2. Step 2: Convert to fraction form
    678,777.10/936,657.75 = 392,315.74/x
  3. Step 3: Cross multiply
    678,777.10x = 936,657.75 × 392,315.74
  4. Step 4: Simplify right side
    678,777.10x = 367,465,578,317.99
  5. Step 5: Solve for x
    x = 367,465,578,317.99/678,777.10
  6. Step 6: Final answer
    x = 541,364.14

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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.