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Finding the Fourth Proportional to 438,894.70, 605,432.16 and 357,310.72

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Solution

The fourth proportional to 438,894.70, 605,432.16 and 357,310.72 is: 492,891.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,894.70 : 605,432.16 = 357,310.72 : x
  2. Step 2: Convert to fraction form
    438,894.70/605,432.16 = 357,310.72/x
  3. Step 3: Cross multiply
    438,894.70x = 605,432.16 × 357,310.72
  4. Step 4: Simplify right side
    438,894.70x = 216,327,401,000.76
  5. Step 5: Solve for x
    x = 216,327,401,000.76/438,894.70
  6. Step 6: Final answer
    x = 492,891.35

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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.