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Finding the Fourth Proportional to 710,675.69, 980,734.97 and 388,385.70

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Solution

The fourth proportional to 710,675.69, 980,734.97 and 388,385.70 is: 535,973.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,675.69 : 980,734.97 = 388,385.70 : x
  2. Step 2: Convert to fraction form
    710,675.69/980,734.97 = 388,385.70/x
  3. Step 3: Cross multiply
    710,675.69x = 980,734.97 × 388,385.70
  4. Step 4: Simplify right side
    710,675.69x = 380,903,435,131.14
  5. Step 5: Solve for x
    x = 380,903,435,131.14/710,675.69
  6. Step 6: Final answer
    x = 535,973.64

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1.5x scale

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.