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Finding the Fourth Proportional to 390,160.80, 538,876.80 and 262,634.40

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Solution

The fourth proportional to 390,160.80, 538,876.80 and 262,634.40 is: 362,741.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,160.80 : 538,876.80 = 262,634.40 : x
  2. Step 2: Convert to fraction form
    390,160.80/538,876.80 = 262,634.40/x
  3. Step 3: Cross multiply
    390,160.80x = 538,876.80 × 262,634.40
  4. Step 4: Simplify right side
    390,160.80x = 141,527,585,041.92
  5. Step 5: Solve for x
    x = 141,527,585,041.92/390,160.80
  6. Step 6: Final answer
    x = 362,741.68

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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.