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Finding the Fourth Proportional to 643,482.36, 888,047.64 and 371,561.70

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Solution

The fourth proportional to 643,482.36, 888,047.64 and 371,561.70 is: 512,779.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,482.36 : 888,047.64 = 371,561.70 : x
  2. Step 2: Convert to fraction form
    643,482.36/888,047.64 = 371,561.70/x
  3. Step 3: Cross multiply
    643,482.36x = 888,047.64 × 371,561.70
  4. Step 4: Simplify right side
    643,482.36x = 329,964,490,799.39
  5. Step 5: Solve for x
    x = 329,964,490,799.39/643,482.36
  6. Step 6: Final answer
    x = 512,779.39

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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.