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Finding the Fourth Proportional to 643,475.36, 888,038 and 371,554.72

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Solution

The fourth proportional to 643,475.36, 888,038 and 371,554.72 is: 512,769.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,475.36 : 888,038 = 371,554.72 : x
  2. Step 2: Convert to fraction form
    643,475.36/888,038 = 371,554.72/x
  3. Step 3: Cross multiply
    643,475.36x = 888,038 × 371,554.72
  4. Step 4: Simplify right side
    643,475.36x = 329,954,710,439.36
  5. Step 5: Solve for x
    x = 329,954,710,439.36/643,475.36
  6. Step 6: Final answer
    x = 512,769.77

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1.5x scale

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.