Home / 691,988.90-954,923.01-405,699.65

Finding the Fourth Proportional to 691,988.90, 954,923.01 and 405,699.65

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Solution

The fourth proportional to 691,988.90, 954,923.01 and 405,699.65 is: 559,852.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,988.90 : 954,923.01 = 405,699.65 : x
  2. Step 2: Convert to fraction form
    691,988.90/954,923.01 = 405,699.65/x
  3. Step 3: Cross multiply
    691,988.90x = 954,923.01 × 405,699.65
  4. Step 4: Simplify right side
    691,988.90x = 387,411,930,933.95
  5. Step 5: Solve for x
    x = 387,411,930,933.95/691,988.90
  6. Step 6: Final answer
    x = 559,852.81

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1.5x scale

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.