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Finding the Fourth Proportional to 710,446.80, 980,403.84 and 388,148.88

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Solution

The fourth proportional to 710,446.80, 980,403.84 and 388,148.88 is: 535,638.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,446.80 : 980,403.84 = 388,148.88 : x
  2. Step 2: Convert to fraction form
    710,446.80/980,403.84 = 388,148.88/x
  3. Step 3: Cross multiply
    710,446.80x = 980,403.84 × 388,148.88
  4. Step 4: Simplify right side
    710,446.80x = 380,542,652,443.70
  5. Step 5: Solve for x
    x = 380,542,652,443.70/710,446.80
  6. Step 6: Final answer
    x = 535,638.49

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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.