Home / 430,929.60-646,912.80-427,819.20

Finding the Fourth Proportional to 430,929.60, 646,912.80 and 427,819.20

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Solution

The fourth proportional to 430,929.60, 646,912.80 and 427,819.20 is: 642,243.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,929.60 : 646,912.80 = 427,819.20 : x
  2. Step 2: Convert to fraction form
    430,929.60/646,912.80 = 427,819.20/x
  3. Step 3: Cross multiply
    430,929.60x = 646,912.80 × 427,819.20
  4. Step 4: Simplify right side
    430,929.60x = 276,761,716,565.76
  5. Step 5: Solve for x
    x = 276,761,716,565.76/430,929.60
  6. Step 6: Final answer
    x = 642,243.46

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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.