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Finding the Fourth Proportional to 710,480.66, 980,434.50 and 388,201.91

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Solution

The fourth proportional to 710,480.66, 980,434.50 and 388,201.91 is: 535,702.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,480.66 : 980,434.50 = 388,201.91 : x
  2. Step 2: Convert to fraction form
    710,480.66/980,434.50 = 388,201.91/x
  3. Step 3: Cross multiply
    710,480.66x = 980,434.50 × 388,201.91
  4. Step 4: Simplify right side
    710,480.66x = 380,606,539,171.97
  5. Step 5: Solve for x
    x = 380,606,539,171.97/710,480.66
  6. Step 6: Final answer
    x = 535,702.89

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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.