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Finding the Fourth Proportional to 570,480.81, 787,262.16 and 328,761.28

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Solution

The fourth proportional to 570,480.81, 787,262.16 and 328,761.28 is: 453,689.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,480.81 : 787,262.16 = 328,761.28 : x
  2. Step 2: Convert to fraction form
    570,480.81/787,262.16 = 328,761.28/x
  3. Step 3: Cross multiply
    570,480.81x = 787,262.16 × 328,761.28
  4. Step 4: Simplify right side
    570,480.81x = 258,821,315,417.17
  5. Step 5: Solve for x
    x = 258,821,315,417.17/570,480.81
  6. Step 6: Final answer
    x = 453,689.78

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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.