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Finding the Fourth Proportional to 553,522.01, 763,933.68 and 311,852.43

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Solution

The fourth proportional to 553,522.01, 763,933.68 and 311,852.43 is: 430,397.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,522.01 : 763,933.68 = 311,852.43 : x
  2. Step 2: Convert to fraction form
    553,522.01/763,933.68 = 311,852.43/x
  3. Step 3: Cross multiply
    553,522.01x = 763,933.68 × 311,852.43
  4. Step 4: Simplify right side
    553,522.01x = 238,234,574,466.84
  5. Step 5: Solve for x
    x = 238,234,574,466.84/553,522.01
  6. Step 6: Final answer
    x = 430,397.66

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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.