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Finding the Fourth Proportional to 678,688.77, 936,601.79 and 372,793.46

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Solution

The fourth proportional to 678,688.77, 936,601.79 and 372,793.46 is: 514,461.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,688.77 : 936,601.79 = 372,793.46 : x
  2. Step 2: Convert to fraction form
    678,688.77/936,601.79 = 372,793.46/x
  3. Step 3: Cross multiply
    678,688.77x = 936,601.79 × 372,793.46
  4. Step 4: Simplify right side
    678,688.77x = 349,159,015,389.32
  5. Step 5: Solve for x
    x = 349,159,015,389.32/678,688.77
  6. Step 6: Final answer
    x = 514,461.17

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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.