Home / 678,969.40-936,587.98-423,877.72

Finding the Fourth Proportional to 678,969.40, 936,587.98 and 423,877.72

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Solution

The fourth proportional to 678,969.40, 936,587.98 and 423,877.72 is: 584,707.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,969.40 : 936,587.98 = 423,877.72 : x
  2. Step 2: Convert to fraction form
    678,969.40/936,587.98 = 423,877.72/x
  3. Step 3: Cross multiply
    678,969.40x = 936,587.98 × 423,877.72
  4. Step 4: Simplify right side
    678,969.40x = 396,998,777,541.81
  5. Step 5: Solve for x
    x = 396,998,777,541.81/678,969.40
  6. Step 6: Final answer
    x = 584,707.91

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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.