Home / 470,459.23-705,689.40-128,905.57

Finding the Fourth Proportional to 470,459.23, 705,689.40 and 128,905.57

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Solution

The fourth proportional to 470,459.23, 705,689.40 and 128,905.57 is: 193,358.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,459.23 : 705,689.40 = 128,905.57 : x
  2. Step 2: Convert to fraction form
    470,459.23/705,689.40 = 128,905.57/x
  3. Step 3: Cross multiply
    470,459.23x = 705,689.40 × 128,905.57
  4. Step 4: Simplify right side
    470,459.23x = 90,967,295,715.47
  5. Step 5: Solve for x
    x = 90,967,295,715.47/470,459.23
  6. Step 6: Final answer
    x = 193,358.51

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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.