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Finding the Fourth Proportional to 480,905.40, 663,530.22 and 310,935

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Solution

The fourth proportional to 480,905.40, 663,530.22 and 310,935 is: 429,013.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,905.40 : 663,530.22 = 310,935 : x
  2. Step 2: Convert to fraction form
    480,905.40/663,530.22 = 310,935/x
  3. Step 3: Cross multiply
    480,905.40x = 663,530.22 × 310,935
  4. Step 4: Simplify right side
    480,905.40x = 206,314,768,955.70
  5. Step 5: Solve for x
    x = 206,314,768,955.70/480,905.40
  6. Step 6: Final answer
    x = 429,013.21

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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.