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Finding the Fourth Proportional to 388,977.80, 583,466.70 and 310,245.80

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Solution

The fourth proportional to 388,977.80, 583,466.70 and 310,245.80 is: 465,368.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,977.80 : 583,466.70 = 310,245.80 : x
  2. Step 2: Convert to fraction form
    388,977.80/583,466.70 = 310,245.80/x
  3. Step 3: Cross multiply
    388,977.80x = 583,466.70 × 310,245.80
  4. Step 4: Simplify right side
    388,977.80x = 181,018,093,114.86
  5. Step 5: Solve for x
    x = 181,018,093,114.86/388,977.80
  6. Step 6: Final answer
    x = 465,368.70

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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.