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Finding the Fourth Proportional to 553,540.80, 763,958.88 and 311,870.01

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Solution

The fourth proportional to 553,540.80, 763,958.88 and 311,870.01 is: 430,421.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,540.80 : 763,958.88 = 311,870.01 : x
  2. Step 2: Convert to fraction form
    553,540.80/763,958.88 = 311,870.01/x
  3. Step 3: Cross multiply
    553,540.80x = 763,958.88 × 311,870.01
  4. Step 4: Simplify right side
    553,540.80x = 238,255,863,545.19
  5. Step 5: Solve for x
    x = 238,255,863,545.19/553,540.80
  6. Step 6: Final answer
    x = 430,421.50

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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.