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Finding the Fourth Proportional to 710,603.30, 980,645.38 and 388,326.98

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Solution

The fourth proportional to 710,603.30, 980,645.38 and 388,326.98 is: 535,898.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,603.30 : 980,645.38 = 388,326.98 : x
  2. Step 2: Convert to fraction form
    710,603.30/980,645.38 = 388,326.98/x
  3. Step 3: Cross multiply
    710,603.30x = 980,645.38 × 388,326.98
  4. Step 4: Simplify right side
    710,603.30x = 380,811,053,963.13
  5. Step 5: Solve for x
    x = 380,811,053,963.13/710,603.30
  6. Step 6: Final answer
    x = 535,898.24

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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.