Home / 430,905.60-646,876.80-427,795.20

Finding the Fourth Proportional to 430,905.60, 646,876.80 and 427,795.20

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Solution

The fourth proportional to 430,905.60, 646,876.80 and 427,795.20 is: 642,207.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,905.60 : 646,876.80 = 427,795.20 : x
  2. Step 2: Convert to fraction form
    430,905.60/646,876.80 = 427,795.20/x
  3. Step 3: Cross multiply
    430,905.60x = 646,876.80 × 427,795.20
  4. Step 4: Simplify right side
    430,905.60x = 276,730,790,031.36
  5. Step 5: Solve for x
    x = 276,730,790,031.36/430,905.60
  6. Step 6: Final answer
    x = 642,207.46

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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.