Home / 679,699.90-1,018,383.45-442,920.70

Finding the Fourth Proportional to 679,699.90, 1,018,383.45 and 442,920.70

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Solution

The fourth proportional to 679,699.90, 1,018,383.45 and 442,920.70 is: 663,620.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,699.90 : 1,018,383.45 = 442,920.70 : x
  2. Step 2: Convert to fraction form
    679,699.90/1,018,383.45 = 442,920.70/x
  3. Step 3: Cross multiply
    679,699.90x = 1,018,383.45 × 442,920.70
  4. Step 4: Simplify right side
    679,699.90x = 451,063,110,542.42
  5. Step 5: Solve for x
    x = 451,063,110,542.42/679,699.90
  6. Step 6: Final answer
    x = 663,620.98

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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.