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Finding the Fourth Proportional to 679,235, 936,969.88 and 551,689.16

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Solution

The fourth proportional to 679,235, 936,969.88 and 551,689.16 is: 761,026.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,235 : 936,969.88 = 551,689.16 : x
  2. Step 2: Convert to fraction form
    679,235/936,969.88 = 551,689.16/x
  3. Step 3: Cross multiply
    679,235x = 936,969.88 × 551,689.16
  4. Step 4: Simplify right side
    679,235x = 516,916,123,284.06
  5. Step 5: Solve for x
    x = 516,916,123,284.06/679,235
  6. Step 6: Final answer
    x = 761,026.92

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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.