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Finding the Fourth Proportional to 660,996.23, 912,093.13 and 402,779.06

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Solution

The fourth proportional to 660,996.23, 912,093.13 and 402,779.06 is: 555,785.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,996.23 : 912,093.13 = 402,779.06 : x
  2. Step 2: Convert to fraction form
    660,996.23/912,093.13 = 402,779.06/x
  3. Step 3: Cross multiply
    660,996.23x = 912,093.13 × 402,779.06
  4. Step 4: Simplify right side
    660,996.23x = 367,372,007,966.44
  5. Step 5: Solve for x
    x = 367,372,007,966.44/660,996.23
  6. Step 6: Final answer
    x = 555,785.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.