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Finding the Fourth Proportional to 643,168.37, 887,550 and 356,715.11

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Solution

The fourth proportional to 643,168.37, 887,550 and 356,715.11 is: 492,254.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,168.37 : 887,550 = 356,715.11 : x
  2. Step 2: Convert to fraction form
    643,168.37/887,550 = 356,715.11/x
  3. Step 3: Cross multiply
    643,168.37x = 887,550 × 356,715.11
  4. Step 4: Simplify right side
    643,168.37x = 316,602,495,880.50
  5. Step 5: Solve for x
    x = 316,602,495,880.50/643,168.37
  6. Step 6: Final answer
    x = 492,254.46

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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.