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Finding the Fourth Proportional to 570,479.81, 787,260.78 and 328,760.28

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Solution

The fourth proportional to 570,479.81, 787,260.78 and 328,760.28 is: 453,688.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,479.81 : 787,260.78 = 328,760.28 : x
  2. Step 2: Convert to fraction form
    570,479.81/787,260.78 = 328,760.28/x
  3. Step 3: Cross multiply
    570,479.81x = 787,260.78 × 328,760.28
  4. Step 4: Simplify right side
    570,479.81x = 258,820,074,465.82
  5. Step 5: Solve for x
    x = 258,820,074,465.82/570,479.81
  6. Step 6: Final answer
    x = 453,688.41

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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.