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Finding the Fourth Proportional to 518,616, 778,055.28 and 144,639

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Solution

The fourth proportional to 518,616, 778,055.28 and 144,639 is: 216,995.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,616 : 778,055.28 = 144,639 : x
  2. Step 2: Convert to fraction form
    518,616/778,055.28 = 144,639/x
  3. Step 3: Cross multiply
    518,616x = 778,055.28 × 144,639
  4. Step 4: Simplify right side
    518,616x = 112,537,137,643.92
  5. Step 5: Solve for x
    x = 112,537,137,643.92/518,616
  6. Step 6: Final answer
    x = 216,995.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.