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Finding the Fourth Proportional to 716,852.40, 989,248.47 and 394,555.56

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Solution

The fourth proportional to 716,852.40, 989,248.47 and 394,555.56 is: 544,482.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,852.40 : 989,248.47 = 394,555.56 : x
  2. Step 2: Convert to fraction form
    716,852.40/989,248.47 = 394,555.56/x
  3. Step 3: Cross multiply
    716,852.40x = 989,248.47 × 394,555.56
  4. Step 4: Simplify right side
    716,852.40x = 390,313,484,059.99
  5. Step 5: Solve for x
    x = 390,313,484,059.99/716,852.40
  6. Step 6: Final answer
    x = 544,482.36

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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.