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Finding the Fourth Proportional to 643,892.37, 888,574.91 and 402,315.04

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Solution

The fourth proportional to 643,892.37, 888,574.91 and 402,315.04 is: 555,196.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,892.37 : 888,574.91 = 402,315.04 : x
  2. Step 2: Convert to fraction form
    643,892.37/888,574.91 = 402,315.04/x
  3. Step 3: Cross multiply
    643,892.37x = 888,574.91 × 402,315.04
  4. Step 4: Simplify right side
    643,892.37x = 357,487,050,459.65
  5. Step 5: Solve for x
    x = 357,487,050,459.65/643,892.37
  6. Step 6: Final answer
    x = 555,196.90

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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.