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Finding the Fourth Proportional to 628,890.89, 867,885.03 and 342,426.69

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Solution

The fourth proportional to 628,890.89, 867,885.03 and 342,426.69 is: 472,557.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,890.89 : 867,885.03 = 342,426.69 : x
  2. Step 2: Convert to fraction form
    628,890.89/867,885.03 = 342,426.69/x
  3. Step 3: Cross multiply
    628,890.89x = 867,885.03 × 342,426.69
  4. Step 4: Simplify right side
    628,890.89x = 297,186,998,123.45
  5. Step 5: Solve for x
    x = 297,186,998,123.45/628,890.89
  6. Step 6: Final answer
    x = 472,557.33

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Double scale
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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.