Home / 430,931.60-646,915.80-427,821.20

Finding the Fourth Proportional to 430,931.60, 646,915.80 and 427,821.20

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Solution

The fourth proportional to 430,931.60, 646,915.80 and 427,821.20 is: 642,246.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,931.60 : 646,915.80 = 427,821.20 : x
  2. Step 2: Convert to fraction form
    430,931.60/646,915.80 = 427,821.20/x
  3. Step 3: Cross multiply
    430,931.60x = 646,915.80 × 427,821.20
  4. Step 4: Simplify right side
    430,931.60x = 276,764,293,854.96
  5. Step 5: Solve for x
    x = 276,764,293,854.96/430,931.60
  6. Step 6: Final answer
    x = 642,246.46

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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.