Home / 643,899.63-888,565.14-353,509.77

Finding the Fourth Proportional to 643,899.63, 888,565.14 and 353,509.77

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Solution

The fourth proportional to 643,899.63, 888,565.14 and 353,509.77 is: 487,834.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,899.63 : 888,565.14 = 353,509.77 : x
  2. Step 2: Convert to fraction form
    643,899.63/888,565.14 = 353,509.77/x
  3. Step 3: Cross multiply
    643,899.63x = 888,565.14 × 353,509.77
  4. Step 4: Simplify right side
    643,899.63x = 314,116,458,271.42
  5. Step 5: Solve for x
    x = 314,116,458,271.42/643,899.63
  6. Step 6: Final answer
    x = 487,834.51

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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.