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Finding the Fourth Proportional to 678,900.73, 936,899.51 and 372,996.92

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Solution

The fourth proportional to 678,900.73, 936,899.51 and 372,996.92 is: 514,744.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,900.73 : 936,899.51 = 372,996.92 : x
  2. Step 2: Convert to fraction form
    678,900.73/936,899.51 = 372,996.92/x
  3. Step 3: Cross multiply
    678,900.73x = 936,899.51 × 372,996.92
  4. Step 4: Simplify right side
    678,900.73x = 349,460,634,854.25
  5. Step 5: Solve for x
    x = 349,460,634,854.25/678,900.73
  6. Step 6: Final answer
    x = 514,744.82

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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.