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Finding the Fourth Proportional to 645,649.14, 890,465.22 and 573,105

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Solution

The fourth proportional to 645,649.14, 890,465.22 and 573,105 is: 790,413.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,649.14 : 890,465.22 = 573,105 : x
  2. Step 2: Convert to fraction form
    645,649.14/890,465.22 = 573,105/x
  3. Step 3: Cross multiply
    645,649.14x = 890,465.22 × 573,105
  4. Step 4: Simplify right side
    645,649.14x = 510,330,069,908.10
  5. Step 5: Solve for x
    x = 510,330,069,908.10/645,649.14
  6. Step 6: Final answer
    x = 790,413.92

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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.