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Finding the Fourth Proportional to 488,790.20, 685,239.40 and 488,790.20

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Solution

The fourth proportional to 488,790.20, 685,239.40 and 488,790.20 is: 685,239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,790.20 : 685,239.40 = 488,790.20 : x
  2. Step 2: Convert to fraction form
    488,790.20/685,239.40 = 488,790.20/x
  3. Step 3: Cross multiply
    488,790.20x = 685,239.40 × 488,790.20
  4. Step 4: Simplify right side
    488,790.20x = 334,938,303,373.88
  5. Step 5: Solve for x
    x = 334,938,303,373.88/488,790.20
  6. Step 6: Final answer
    x = 685,239.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.