Home / 659,917.60-989,876.40-423,721.60

Finding the Fourth Proportional to 659,917.60, 989,876.40 and 423,721.60

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Solution

The fourth proportional to 659,917.60, 989,876.40 and 423,721.60 is: 635,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,917.60 : 989,876.40 = 423,721.60 : x
  2. Step 2: Convert to fraction form
    659,917.60/989,876.40 = 423,721.60/x
  3. Step 3: Cross multiply
    659,917.60x = 989,876.40 × 423,721.60
  4. Step 4: Simplify right side
    659,917.60x = 419,432,012,010.24
  5. Step 5: Solve for x
    x = 419,432,012,010.24/659,917.60
  6. Step 6: Final answer
    x = 635,582.40

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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.