Home / 430,827.20-645,981.60-220,875.20

Finding the Fourth Proportional to 430,827.20, 645,981.60 and 220,875.20

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Solution

The fourth proportional to 430,827.20, 645,981.60 and 220,875.20 is: 331,179.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,827.20 : 645,981.60 = 220,875.20 : x
  2. Step 2: Convert to fraction form
    430,827.20/645,981.60 = 220,875.20/x
  3. Step 3: Cross multiply
    430,827.20x = 645,981.60 × 220,875.20
  4. Step 4: Simplify right side
    430,827.20x = 142,681,315,096.32
  5. Step 5: Solve for x
    x = 142,681,315,096.32/430,827.20
  6. Step 6: Final answer
    x = 331,179.91

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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.