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Finding the Fourth Proportional to 870,950.90, 1,201,881.40 and 488,993.78

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Solution

The fourth proportional to 870,950.90, 1,201,881.40 and 488,993.78 is: 674,794.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,950.90 : 1,201,881.40 = 488,993.78 : x
  2. Step 2: Convert to fraction form
    870,950.90/1,201,881.40 = 488,993.78/x
  3. Step 3: Cross multiply
    870,950.90x = 1,201,881.40 × 488,993.78
  4. Step 4: Simplify right side
    870,950.90x = 587,712,528,897.69
  5. Step 5: Solve for x
    x = 587,712,528,897.69/870,950.90
  6. Step 6: Final answer
    x = 674,794.10

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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.