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Finding the Fourth Proportional to 716,862.40, 989,262.28 and 394,565.56

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Solution

The fourth proportional to 716,862.40, 989,262.28 and 394,565.56 is: 544,496.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,862.40 : 989,262.28 = 394,565.56 : x
  2. Step 2: Convert to fraction form
    716,862.40/989,262.28 = 394,565.56/x
  3. Step 3: Cross multiply
    716,862.40x = 989,262.28 × 394,565.56
  4. Step 4: Simplify right side
    716,862.40x = 390,328,825,495.08
  5. Step 5: Solve for x
    x = 390,328,825,495.08/716,862.40
  6. Step 6: Final answer
    x = 544,496.16

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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.