Home / 430,437.60-645,364.80-219,902.40

Finding the Fourth Proportional to 430,437.60, 645,364.80 and 219,902.40

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Solution

The fourth proportional to 430,437.60, 645,364.80 and 219,902.40 is: 329,704.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,437.60 : 645,364.80 = 219,902.40 : x
  2. Step 2: Convert to fraction form
    430,437.60/645,364.80 = 219,902.40/x
  3. Step 3: Cross multiply
    430,437.60x = 645,364.80 × 219,902.40
  4. Step 4: Simplify right side
    430,437.60x = 141,917,268,395.52
  5. Step 5: Solve for x
    x = 141,917,268,395.52/430,437.60
  6. Step 6: Final answer
    x = 329,704.63

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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.