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Finding the Fourth Proportional to 518,443.39, 778,017.75 and 318,152.47

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Solution

The fourth proportional to 518,443.39, 778,017.75 and 318,152.47 is: 477,445.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,443.39 : 778,017.75 = 318,152.47 : x
  2. Step 2: Convert to fraction form
    518,443.39/778,017.75 = 318,152.47/x
  3. Step 3: Cross multiply
    518,443.39x = 778,017.75 × 318,152.47
  4. Step 4: Simplify right side
    518,443.39x = 247,528,265,893.64
  5. Step 5: Solve for x
    x = 247,528,265,893.64/518,443.39
  6. Step 6: Final answer
    x = 477,445.11

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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.