Home / 578,423.70-868,672.35-420,830.10

Finding the Fourth Proportional to 578,423.70, 868,672.35 and 420,830.10

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Solution

The fourth proportional to 578,423.70, 868,672.35 and 420,830.10 is: 631,999.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,423.70 : 868,672.35 = 420,830.10 : x
  2. Step 2: Convert to fraction form
    578,423.70/868,672.35 = 420,830.10/x
  3. Step 3: Cross multiply
    578,423.70x = 868,672.35 × 420,830.10
  4. Step 4: Simplify right side
    578,423.70x = 365,563,471,917.74
  5. Step 5: Solve for x
    x = 365,563,471,917.74/578,423.70
  6. Step 6: Final answer
    x = 631,999.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.