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Finding the Fourth Proportional to 678,315.84, 936,086.84 and 372,420.42

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Solution

The fourth proportional to 678,315.84, 936,086.84 and 372,420.42 is: 513,946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,315.84 : 936,086.84 = 372,420.42 : x
  2. Step 2: Convert to fraction form
    678,315.84/936,086.84 = 372,420.42/x
  3. Step 3: Cross multiply
    678,315.84x = 936,086.84 × 372,420.42
  4. Step 4: Simplify right side
    678,315.84x = 348,617,852,247.17
  5. Step 5: Solve for x
    x = 348,617,852,247.17/678,315.84
  6. Step 6: Final answer
    x = 513,946.21

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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.