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Finding the Fourth Proportional to 389,909.02, 537,768.66 and 253,985.74

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Solution

The fourth proportional to 389,909.02, 537,768.66 and 253,985.74 is: 350,301.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,909.02 : 537,768.66 = 253,985.74 : x
  2. Step 2: Convert to fraction form
    389,909.02/537,768.66 = 253,985.74/x
  3. Step 3: Cross multiply
    389,909.02x = 537,768.66 × 253,985.74
  4. Step 4: Simplify right side
    389,909.02x = 136,585,571,058.91
  5. Step 5: Solve for x
    x = 136,585,571,058.91/389,909.02
  6. Step 6: Final answer
    x = 350,301.13

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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.