Home / 679,128.10-1,018,509.90-323,434.42

Finding the Fourth Proportional to 679,128.10, 1,018,509.90 and 323,434.42

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Solution

The fourth proportional to 679,128.10, 1,018,509.90 and 323,434.42 is: 485,064.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,128.10 : 1,018,509.90 = 323,434.42 : x
  2. Step 2: Convert to fraction form
    679,128.10/1,018,509.90 = 323,434.42/x
  3. Step 3: Cross multiply
    679,128.10x = 1,018,509.90 × 323,434.42
  4. Step 4: Simplify right side
    679,128.10x = 329,421,155,011.60
  5. Step 5: Solve for x
    x = 329,421,155,011.60/679,128.10
  6. Step 6: Final answer
    x = 485,064.83

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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.