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Finding the Fourth Proportional to 518,359.03, 715,338.81 and 288,930.89

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Solution

The fourth proportional to 518,359.03, 715,338.81 and 288,930.89 is: 398,726.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,359.03 : 715,338.81 = 288,930.89 : x
  2. Step 2: Convert to fraction form
    518,359.03/715,338.81 = 288,930.89/x
  3. Step 3: Cross multiply
    518,359.03x = 715,338.81 × 288,930.89
  4. Step 4: Simplify right side
    518,359.03x = 206,683,480,813.19
  5. Step 5: Solve for x
    x = 206,683,480,813.19/518,359.03
  6. Step 6: Final answer
    x = 398,726.50

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1.5x scale

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.