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Finding the Fourth Proportional to 553,582.44, 763,946.10 and 311,867.91

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Solution

The fourth proportional to 553,582.44, 763,946.10 and 311,867.91 is: 430,379.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,582.44 : 763,946.10 = 311,867.91 : x
  2. Step 2: Convert to fraction form
    553,582.44/763,946.10 = 311,867.91/x
  3. Step 3: Cross multiply
    553,582.44x = 763,946.10 × 311,867.91
  4. Step 4: Simplify right side
    553,582.44x = 238,250,273,559.65
  5. Step 5: Solve for x
    x = 238,250,273,559.65/553,582.44
  6. Step 6: Final answer
    x = 430,379.03

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1.5x scale

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.