Home / 687,415.80-1,032,047.10-403,397.40

Finding the Fourth Proportional to 687,415.80, 1,032,047.10 and 403,397.40

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Solution

The fourth proportional to 687,415.80, 1,032,047.10 and 403,397.40 is: 605,637.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,415.80 : 1,032,047.10 = 403,397.40 : x
  2. Step 2: Convert to fraction form
    687,415.80/1,032,047.10 = 403,397.40/x
  3. Step 3: Cross multiply
    687,415.80x = 1,032,047.10 × 403,397.40
  4. Step 4: Simplify right side
    687,415.80x = 416,325,116,817.54
  5. Step 5: Solve for x
    x = 416,325,116,817.54/687,415.80
  6. Step 6: Final answer
    x = 605,637.98

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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.