Home / 401,402.72-553,399.86-318,890.46

Finding the Fourth Proportional to 401,402.72, 553,399.86 and 318,890.46

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Solution

The fourth proportional to 401,402.72, 553,399.86 and 318,890.46 is: 439,643.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,402.72 : 553,399.86 = 318,890.46 : x
  2. Step 2: Convert to fraction form
    401,402.72/553,399.86 = 318,890.46/x
  3. Step 3: Cross multiply
    401,402.72x = 553,399.86 × 318,890.46
  4. Step 4: Simplify right side
    401,402.72x = 176,473,935,919.34
  5. Step 5: Solve for x
    x = 176,473,935,919.34/401,402.72
  6. Step 6: Final answer
    x = 439,643.10

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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.