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Finding the Fourth Proportional to 390,265.04, 538,655.75 and 254,061.76

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Solution

The fourth proportional to 390,265.04, 538,655.75 and 254,061.76 is: 350,663.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,265.04 : 538,655.75 = 254,061.76 : x
  2. Step 2: Convert to fraction form
    390,265.04/538,655.75 = 254,061.76/x
  3. Step 3: Cross multiply
    390,265.04x = 538,655.75 × 254,061.76
  4. Step 4: Simplify right side
    390,265.04x = 136,851,827,879.12
  5. Step 5: Solve for x
    x = 136,851,827,879.12/390,265.04
  6. Step 6: Final answer
    x = 350,663.82

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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.