Home / 678,851.55-936,711.10-392,316.35

Finding the Fourth Proportional to 678,851.55, 936,711.10 and 392,316.35

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Solution

The fourth proportional to 678,851.55, 936,711.10 and 392,316.35 is: 541,336.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,851.55 : 936,711.10 = 392,316.35 : x
  2. Step 2: Convert to fraction form
    678,851.55/936,711.10 = 392,316.35/x
  3. Step 3: Cross multiply
    678,851.55x = 936,711.10 × 392,316.35
  4. Step 4: Simplify right side
    678,851.55x = 367,487,076,433.92
  5. Step 5: Solve for x
    x = 367,487,076,433.92/678,851.55
  6. Step 6: Final answer
    x = 541,336.43

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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.