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Finding the Fourth Proportional to 710,447.29, 980,366.08 and 388,088.95

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Solution

The fourth proportional to 710,447.29, 980,366.08 and 388,088.95 is: 535,534.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,447.29 : 980,366.08 = 388,088.95 : x
  2. Step 2: Convert to fraction form
    710,447.29/980,366.08 = 388,088.95/x
  3. Step 3: Cross multiply
    710,447.29x = 980,366.08 × 388,088.95
  4. Step 4: Simplify right side
    710,447.29x = 380,469,242,602.82
  5. Step 5: Solve for x
    x = 380,469,242,602.82/710,447.29
  6. Step 6: Final answer
    x = 535,534.79

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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.