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Finding the Fourth Proportional to 643,373.79, 887,898.02 and 356,925.39

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Solution

The fourth proportional to 643,373.79, 887,898.02 and 356,925.39 is: 492,580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,373.79 : 887,898.02 = 356,925.39 : x
  2. Step 2: Convert to fraction form
    643,373.79/887,898.02 = 356,925.39/x
  3. Step 3: Cross multiply
    643,373.79x = 887,898.02 × 356,925.39
  4. Step 4: Simplify right side
    643,373.79x = 316,913,345,284.10
  5. Step 5: Solve for x
    x = 316,913,345,284.10/643,373.79
  6. Step 6: Final answer
    x = 492,580.44

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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.