Home / 643,055.28-887,235.30-506,666.40

Finding the Fourth Proportional to 643,055.28, 887,235.30 and 506,666.40

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Solution

The fourth proportional to 643,055.28, 887,235.30 and 506,666.40 is: 699,057.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,055.28 : 887,235.30 = 506,666.40 : x
  2. Step 2: Convert to fraction form
    643,055.28/887,235.30 = 506,666.40/x
  3. Step 3: Cross multiply
    643,055.28x = 887,235.30 × 506,666.40
  4. Step 4: Simplify right side
    643,055.28x = 449,532,315,403.92
  5. Step 5: Solve for x
    x = 449,532,315,403.92/643,055.28
  6. Step 6: Final answer
    x = 699,057.03

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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.