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Finding the Fourth Proportional to 710,489.17, 980,446.20 and 388,210.42

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Solution

The fourth proportional to 710,489.17, 980,446.20 and 388,210.42 is: 535,714.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,489.17 : 980,446.20 = 388,210.42 : x
  2. Step 2: Convert to fraction form
    710,489.17/980,446.20 = 388,210.42/x
  3. Step 3: Cross multiply
    710,489.17x = 980,446.20 × 388,210.42
  4. Step 4: Simplify right side
    710,489.17x = 380,619,431,089.40
  5. Step 5: Solve for x
    x = 380,619,431,089.40/710,489.17
  6. Step 6: Final answer
    x = 535,714.61

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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.