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Finding the Fourth Proportional to 390,935.76, 539,549.37 and 247,709.22

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Solution

The fourth proportional to 390,935.76, 539,549.37 and 247,709.22 is: 341,875.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,935.76 : 539,549.37 = 247,709.22 : x
  2. Step 2: Convert to fraction form
    390,935.76/539,549.37 = 247,709.22/x
  3. Step 3: Cross multiply
    390,935.76x = 539,549.37 × 247,709.22
  4. Step 4: Simplify right side
    390,935.76x = 133,651,353,594.19
  5. Step 5: Solve for x
    x = 133,651,353,594.19/390,935.76
  6. Step 6: Final answer
    x = 341,875.49

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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.