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Finding the Fourth Proportional to 710,534.84, 980,509.17 and 388,256.09

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Solution

The fourth proportional to 710,534.84, 980,509.17 and 388,256.09 is: 535,777.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,534.84 : 980,509.17 = 388,256.09 : x
  2. Step 2: Convert to fraction form
    710,534.84/980,509.17 = 388,256.09/x
  3. Step 3: Cross multiply
    710,534.84x = 980,509.17 × 388,256.09
  4. Step 4: Simplify right side
    710,534.84x = 380,688,659,004.62
  5. Step 5: Solve for x
    x = 380,688,659,004.62/710,534.84
  6. Step 6: Final answer
    x = 535,777.61

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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.