Home / 765,677.57-1,056,616.40-421,510.70

Finding the Fourth Proportional to 765,677.57, 1,056,616.40 and 421,510.70

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Solution

The fourth proportional to 765,677.57, 1,056,616.40 and 421,510.70 is: 581,674.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,677.57 : 1,056,616.40 = 421,510.70 : x
  2. Step 2: Convert to fraction form
    765,677.57/1,056,616.40 = 421,510.70/x
  3. Step 3: Cross multiply
    765,677.57x = 1,056,616.40 × 421,510.70
  4. Step 4: Simplify right side
    765,677.57x = 445,375,111,004.85
  5. Step 5: Solve for x
    x = 445,375,111,004.85/765,677.57
  6. Step 6: Final answer
    x = 581,674.50

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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.