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Finding the Fourth Proportional to 713,842.20, 985,085.28 and 391,549.44

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Solution

The fourth proportional to 713,842.20, 985,085.28 and 391,549.44 is: 540,328.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,842.20 : 985,085.28 = 391,549.44 : x
  2. Step 2: Convert to fraction form
    713,842.20/985,085.28 = 391,549.44/x
  3. Step 3: Cross multiply
    713,842.20x = 985,085.28 × 391,549.44
  4. Step 4: Simplify right side
    713,842.20x = 385,709,589,736.24
  5. Step 5: Solve for x
    x = 385,709,589,736.24/713,842.20
  6. Step 6: Final answer
    x = 540,328.93

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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.