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Finding the Fourth Proportional to 716,696.71, 989,041.60 and 394,406.81

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Solution

The fourth proportional to 716,696.71, 989,041.60 and 394,406.81 is: 544,281.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,696.71 : 989,041.60 = 394,406.81 : x
  2. Step 2: Convert to fraction form
    716,696.71/989,041.60 = 394,406.81/x
  3. Step 3: Cross multiply
    716,696.71x = 989,041.60 × 394,406.81
  4. Step 4: Simplify right side
    716,696.71x = 390,084,742,966.99
  5. Step 5: Solve for x
    x = 390,084,742,966.99/716,696.71
  6. Step 6: Final answer
    x = 544,281.47

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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.