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Finding the Fourth Proportional to 518,918.48, 778,602.51 and 278,752.16

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Solution

The fourth proportional to 518,918.48, 778,602.51 and 278,752.16 is: 418,248.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,918.48 : 778,602.51 = 278,752.16 : x
  2. Step 2: Convert to fraction form
    518,918.48/778,602.51 = 278,752.16/x
  3. Step 3: Cross multiply
    518,918.48x = 778,602.51 × 278,752.16
  4. Step 4: Simplify right side
    518,918.48x = 217,037,131,443.92
  5. Step 5: Solve for x
    x = 217,037,131,443.92/518,918.48
  6. Step 6: Final answer
    x = 418,248.99

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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.