Home / 668,721.80-1,003,082.70-402,345.20

Finding the Fourth Proportional to 668,721.80, 1,003,082.70 and 402,345.20

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Solution

The fourth proportional to 668,721.80, 1,003,082.70 and 402,345.20 is: 603,517.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,721.80 : 1,003,082.70 = 402,345.20 : x
  2. Step 2: Convert to fraction form
    668,721.80/1,003,082.70 = 402,345.20/x
  3. Step 3: Cross multiply
    668,721.80x = 1,003,082.70 × 402,345.20
  4. Step 4: Simplify right side
    668,721.80x = 403,585,509,548.04
  5. Step 5: Solve for x
    x = 403,585,509,548.04/668,721.80
  6. Step 6: Final answer
    x = 603,517.80

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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.