Home / 430,655.67-645,983.71-193,721.54

Finding the Fourth Proportional to 430,655.67, 645,983.71 and 193,721.54

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Solution

The fourth proportional to 430,655.67, 645,983.71 and 193,721.54 is: 290,582.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,655.67 : 645,983.71 = 193,721.54 : x
  2. Step 2: Convert to fraction form
    430,655.67/645,983.71 = 193,721.54/x
  3. Step 3: Cross multiply
    430,655.67x = 645,983.71 × 193,721.54
  4. Step 4: Simplify right side
    430,655.67x = 125,140,955,401.89
  5. Step 5: Solve for x
    x = 125,140,955,401.89/430,655.67
  6. Step 6: Final answer
    x = 290,582.39

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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.