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Finding the Fourth Proportional to 713,754.89, 985,009.37 and 391,478.57

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Solution

The fourth proportional to 713,754.89, 985,009.37 and 391,478.57 is: 540,255.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,754.89 : 985,009.37 = 391,478.57 : x
  2. Step 2: Convert to fraction form
    713,754.89/985,009.37 = 391,478.57/x
  3. Step 3: Cross multiply
    713,754.89x = 985,009.37 × 391,478.57
  4. Step 4: Simplify right side
    713,754.89x = 385,610,052,721.76
  5. Step 5: Solve for x
    x = 385,610,052,721.76/713,754.89
  6. Step 6: Final answer
    x = 540,255.57

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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.