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Finding the Fourth Proportional to 456,740.40, 685,110.60 and 425,636.40

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Solution

The fourth proportional to 456,740.40, 685,110.60 and 425,636.40 is: 638,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,740.40 : 685,110.60 = 425,636.40 : x
  2. Step 2: Convert to fraction form
    456,740.40/685,110.60 = 425,636.40/x
  3. Step 3: Cross multiply
    456,740.40x = 685,110.60 × 425,636.40
  4. Step 4: Simplify right side
    456,740.40x = 291,608,009,385.84
  5. Step 5: Solve for x
    x = 291,608,009,385.84/456,740.40
  6. Step 6: Final answer
    x = 638,454.60

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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.