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Finding the Fourth Proportional to 671,394.85, 926,720.55 and 438,855.57

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Solution

The fourth proportional to 671,394.85, 926,720.55 and 438,855.57 is: 605,748.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,394.85 : 926,720.55 = 438,855.57 : x
  2. Step 2: Convert to fraction form
    671,394.85/926,720.55 = 438,855.57/x
  3. Step 3: Cross multiply
    671,394.85x = 926,720.55 × 438,855.57
  4. Step 4: Simplify right side
    671,394.85x = 406,696,475,200.96
  5. Step 5: Solve for x
    x = 406,696,475,200.96/671,394.85
  6. Step 6: Final answer
    x = 605,748.58

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1.5x scale

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.