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Finding the Fourth Proportional to 499,509.35, 689,390.36 and 281,762.72

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Solution

The fourth proportional to 499,509.35, 689,390.36 and 281,762.72 is: 388,870.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,509.35 : 689,390.36 = 281,762.72 : x
  2. Step 2: Convert to fraction form
    499,509.35/689,390.36 = 281,762.72/x
  3. Step 3: Cross multiply
    499,509.35x = 689,390.36 × 281,762.72
  4. Step 4: Simplify right side
    499,509.35x = 194,244,502,975.38
  5. Step 5: Solve for x
    x = 194,244,502,975.38/499,509.35
  6. Step 6: Final answer
    x = 388,870.60

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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.