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Finding the Fourth Proportional to 472,942.80, 708,247.80 and 314,312.40

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Solution

The fourth proportional to 472,942.80, 708,247.80 and 314,312.40 is: 470,693.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,942.80 : 708,247.80 = 314,312.40 : x
  2. Step 2: Convert to fraction form
    472,942.80/708,247.80 = 314,312.40/x
  3. Step 3: Cross multiply
    472,942.80x = 708,247.80 × 314,312.40
  4. Step 4: Simplify right side
    472,942.80x = 222,611,065,812.72
  5. Step 5: Solve for x
    x = 222,611,065,812.72/472,942.80
  6. Step 6: Final answer
    x = 470,693.42

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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.