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Finding the Fourth Proportional to 463,779.20, 696,513.60 and 405,718.40

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Solution

The fourth proportional to 463,779.20, 696,513.60 and 405,718.40 is: 609,316.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,779.20 : 696,513.60 = 405,718.40 : x
  2. Step 2: Convert to fraction form
    463,779.20/696,513.60 = 405,718.40/x
  3. Step 3: Cross multiply
    463,779.20x = 696,513.60 × 405,718.40
  4. Step 4: Simplify right side
    463,779.20x = 282,588,383,370.24
  5. Step 5: Solve for x
    x = 282,588,383,370.24/463,779.20
  6. Step 6: Final answer
    x = 609,316.64

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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.