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Finding the Fourth Proportional to 660,060.95, 989,036.78 and 423,207.23

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Solution

The fourth proportional to 660,060.95, 989,036.78 and 423,207.23 is: 634,134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,060.95 : 989,036.78 = 423,207.23 : x
  2. Step 2: Convert to fraction form
    660,060.95/989,036.78 = 423,207.23/x
  3. Step 3: Cross multiply
    660,060.95x = 989,036.78 × 423,207.23
  4. Step 4: Simplify right side
    660,060.95x = 418,567,508,970.70
  5. Step 5: Solve for x
    x = 418,567,508,970.70/660,060.95
  6. Step 6: Final answer
    x = 634,134.64

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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.