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Finding the Fourth Proportional to 402,485.81, 555,428.55 and 230,402.82

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Solution

The fourth proportional to 402,485.81, 555,428.55 and 230,402.82 is: 317,954.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,485.81 : 555,428.55 = 230,402.82 : x
  2. Step 2: Convert to fraction form
    402,485.81/555,428.55 = 230,402.82/x
  3. Step 3: Cross multiply
    402,485.81x = 555,428.55 × 230,402.82
  4. Step 4: Simplify right side
    402,485.81x = 127,972,304,228.51
  5. Step 5: Solve for x
    x = 127,972,304,228.51/402,485.81
  6. Step 6: Final answer
    x = 317,954.83

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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.