Home / 679,890.80-1,018,961.40-413,368.40

Finding the Fourth Proportional to 679,890.80, 1,018,961.40 and 413,368.40

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Solution

The fourth proportional to 679,890.80, 1,018,961.40 and 413,368.40 is: 619,520.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,890.80 : 1,018,961.40 = 413,368.40 : x
  2. Step 2: Convert to fraction form
    679,890.80/1,018,961.40 = 413,368.40/x
  3. Step 3: Cross multiply
    679,890.80x = 1,018,961.40 × 413,368.40
  4. Step 4: Simplify right side
    679,890.80x = 421,206,443,579.76
  5. Step 5: Solve for x
    x = 421,206,443,579.76/679,890.80
  6. Step 6: Final answer
    x = 619,520.73

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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.