Home / 643,131.52-887,547.84-388,432.96

Finding the Fourth Proportional to 643,131.52, 887,547.84 and 388,432.96

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Solution

The fourth proportional to 643,131.52, 887,547.84 and 388,432.96 is: 536,053.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,131.52 : 887,547.84 = 388,432.96 : x
  2. Step 2: Convert to fraction form
    643,131.52/887,547.84 = 388,432.96/x
  3. Step 3: Cross multiply
    643,131.52x = 887,547.84 × 388,432.96
  4. Step 4: Simplify right side
    643,131.52x = 344,752,834,632.81
  5. Step 5: Solve for x
    x = 344,752,834,632.81/643,131.52
  6. Step 6: Final answer
    x = 536,053.39

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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.