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Finding the Fourth Proportional to 643,263.66, 887,122.98 and 401,568.66

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Solution

The fourth proportional to 643,263.66, 887,122.98 and 401,568.66 is: 553,802.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,263.66 : 887,122.98 = 401,568.66 : x
  2. Step 2: Convert to fraction form
    643,263.66/887,122.98 = 401,568.66/x
  3. Step 3: Cross multiply
    643,263.66x = 887,122.98 × 401,568.66
  4. Step 4: Simplify right side
    643,263.66x = 356,240,786,333.81
  5. Step 5: Solve for x
    x = 356,240,786,333.81/643,263.66
  6. Step 6: Final answer
    x = 553,802.13

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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.