Home / 645,669.11-891,019.08-355,298.36

Finding the Fourth Proportional to 645,669.11, 891,019.08 and 355,298.36

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Solution

The fourth proportional to 645,669.11, 891,019.08 and 355,298.36 is: 490,309.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,669.11 : 891,019.08 = 355,298.36 : x
  2. Step 2: Convert to fraction form
    645,669.11/891,019.08 = 355,298.36/x
  3. Step 3: Cross multiply
    645,669.11x = 891,019.08 × 355,298.36
  4. Step 4: Simplify right side
    645,669.11x = 316,577,613,397.61
  5. Step 5: Solve for x
    x = 316,577,613,397.61/645,669.11
  6. Step 6: Final answer
    x = 490,309.37

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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.