Home / 778,818.40-1,167,421.20-423,080.80

Finding the Fourth Proportional to 778,818.40, 1,167,421.20 and 423,080.80

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Solution

The fourth proportional to 778,818.40, 1,167,421.20 and 423,080.80 is: 634,183.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,818.40 : 1,167,421.20 = 423,080.80 : x
  2. Step 2: Convert to fraction form
    778,818.40/1,167,421.20 = 423,080.80/x
  3. Step 3: Cross multiply
    778,818.40x = 1,167,421.20 × 423,080.80
  4. Step 4: Simplify right side
    778,818.40x = 493,913,495,232.96
  5. Step 5: Solve for x
    x = 493,913,495,232.96/778,818.40
  6. Step 6: Final answer
    x = 634,183.14

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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.