Home / 430,005.60-645,008.40-130,471.65

Finding the Fourth Proportional to 430,005.60, 645,008.40 and 130,471.65

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Solution

The fourth proportional to 430,005.60, 645,008.40 and 130,471.65 is: 195,707.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,005.60 : 645,008.40 = 130,471.65 : x
  2. Step 2: Convert to fraction form
    430,005.60/645,008.40 = 130,471.65/x
  3. Step 3: Cross multiply
    430,005.60x = 645,008.40 × 130,471.65
  4. Step 4: Simplify right side
    430,005.60x = 84,155,310,211.86
  5. Step 5: Solve for x
    x = 84,155,310,211.86/430,005.60
  6. Step 6: Final answer
    x = 195,707.48

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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.