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Finding the Fourth Proportional to 553,879.76, 830,487.45 and 253,984.65

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Solution

The fourth proportional to 553,879.76, 830,487.45 and 253,984.65 is: 380,824.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,879.76 : 830,487.45 = 253,984.65 : x
  2. Step 2: Convert to fraction form
    553,879.76/830,487.45 = 253,984.65/x
  3. Step 3: Cross multiply
    553,879.76x = 830,487.45 × 253,984.65
  4. Step 4: Simplify right side
    553,879.76x = 210,931,064,317.64
  5. Step 5: Solve for x
    x = 210,931,064,317.64/553,879.76
  6. Step 6: Final answer
    x = 380,824.65

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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.