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Finding the Fourth Proportional to 430,779.80, 646,568.66 and 217,697.63

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Solution

The fourth proportional to 430,779.80, 646,568.66 and 217,697.63 is: 326,748.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,779.80 : 646,568.66 = 217,697.63 : x
  2. Step 2: Convert to fraction form
    430,779.80/646,568.66 = 217,697.63/x
  3. Step 3: Cross multiply
    430,779.80x = 646,568.66 × 217,697.63
  4. Step 4: Simplify right side
    430,779.80x = 140,756,462,225.68
  5. Step 5: Solve for x
    x = 140,756,462,225.68/430,779.80
  6. Step 6: Final answer
    x = 326,748.05

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1.5x scale

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.