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Finding the Fourth Proportional to 716,870.40, 989,273.32 and 394,573.56

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Solution

The fourth proportional to 716,870.40, 989,273.32 and 394,573.56 is: 544,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,870.40 : 989,273.32 = 394,573.56 : x
  2. Step 2: Convert to fraction form
    716,870.40/989,273.32 = 394,573.56/x
  3. Step 3: Cross multiply
    716,870.40x = 989,273.32 × 394,573.56
  4. Step 4: Simplify right side
    716,870.40x = 390,341,095,685.42
  5. Step 5: Solve for x
    x = 390,341,095,685.42/716,870.40
  6. Step 6: Final answer
    x = 544,507.20

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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.