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Finding the Fourth Proportional to 518,847.80, 778,854.90 and 401,041.40

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Solution

The fourth proportional to 518,847.80, 778,854.90 and 401,041.40 is: 602,012.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,847.80 : 778,854.90 = 401,041.40 : x
  2. Step 2: Convert to fraction form
    518,847.80/778,854.90 = 401,041.40/x
  3. Step 3: Cross multiply
    518,847.80x = 778,854.90 × 401,041.40
  4. Step 4: Simplify right side
    518,847.80x = 312,353,059,492.86
  5. Step 5: Solve for x
    x = 312,353,059,492.86/518,847.80
  6. Step 6: Final answer
    x = 602,012.88

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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.