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Finding the Fourth Proportional to 849,373.64, 1,172,184 and 486,857.78

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Solution

The fourth proportional to 849,373.64, 1,172,184 and 486,857.78 is: 671,891.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    849,373.64 : 1,172,184 = 486,857.78 : x
  2. Step 2: Convert to fraction form
    849,373.64/1,172,184 = 486,857.78/x
  3. Step 3: Cross multiply
    849,373.64x = 1,172,184 × 486,857.78
  4. Step 4: Simplify right side
    849,373.64x = 570,686,899,991.52
  5. Step 5: Solve for x
    x = 570,686,899,991.52/849,373.64
  6. Step 6: Final answer
    x = 671,891.47

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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.