Home / 430,039.53-645,066.18-163,815.21

Finding the Fourth Proportional to 430,039.53, 645,066.18 and 163,815.21

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Solution

The fourth proportional to 430,039.53, 645,066.18 and 163,815.21 is: 245,725.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,039.53 : 645,066.18 = 163,815.21 : x
  2. Step 2: Convert to fraction form
    430,039.53/645,066.18 = 163,815.21/x
  3. Step 3: Cross multiply
    430,039.53x = 645,066.18 × 163,815.21
  4. Step 4: Simplify right side
    430,039.53x = 105,671,651,740.60
  5. Step 5: Solve for x
    x = 105,671,651,740.60/430,039.53
  6. Step 6: Final answer
    x = 245,725.44

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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.