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Finding the Fourth Proportional to 390,263.04, 538,652.99 and 254,059.76

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Solution

The fourth proportional to 390,263.04, 538,652.99 and 254,059.76 is: 350,661.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,263.04 : 538,652.99 = 254,059.76 : x
  2. Step 2: Convert to fraction form
    390,263.04/538,652.99 = 254,059.76/x
  3. Step 3: Cross multiply
    390,263.04x = 538,652.99 × 254,059.76
  4. Step 4: Simplify right side
    390,263.04x = 136,850,045,399.12
  5. Step 5: Solve for x
    x = 136,850,045,399.12/390,263.04
  6. Step 6: Final answer
    x = 350,661.04

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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.