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Finding the Fourth Proportional to 518,530.40, 777,795.60 and 435,586.40

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Solution

The fourth proportional to 518,530.40, 777,795.60 and 435,586.40 is: 653,379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,530.40 : 777,795.60 = 435,586.40 : x
  2. Step 2: Convert to fraction form
    518,530.40/777,795.60 = 435,586.40/x
  3. Step 3: Cross multiply
    518,530.40x = 777,795.60 × 435,586.40
  4. Step 4: Simplify right side
    518,530.40x = 338,797,185,339.84
  5. Step 5: Solve for x
    x = 338,797,185,339.84/518,530.40
  6. Step 6: Final answer
    x = 653,379.60

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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.