Home / 917,654.21-1,266,565.35-509,896.22

Finding the Fourth Proportional to 917,654.21, 1,266,565.35 and 509,896.22

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Solution

The fourth proportional to 917,654.21, 1,266,565.35 and 509,896.22 is: 703,769.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,654.21 : 1,266,565.35 = 509,896.22 : x
  2. Step 2: Convert to fraction form
    917,654.21/1,266,565.35 = 509,896.22/x
  3. Step 3: Cross multiply
    917,654.21x = 1,266,565.35 × 509,896.22
  4. Step 4: Simplify right side
    917,654.21x = 645,816,884,347.98
  5. Step 5: Solve for x
    x = 645,816,884,347.98/917,654.21
  6. Step 6: Final answer
    x = 703,769.33

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Double scale
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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.