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Finding the Fourth Proportional to 714,292.76, 985,720.91 and 392,008.07

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Solution

The fourth proportional to 714,292.76, 985,720.91 and 392,008.07 is: 540,969.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,292.76 : 985,720.91 = 392,008.07 : x
  2. Step 2: Convert to fraction form
    714,292.76/985,720.91 = 392,008.07/x
  3. Step 3: Cross multiply
    714,292.76x = 985,720.91 × 392,008.07
  4. Step 4: Simplify right side
    714,292.76x = 386,410,544,599.10
  5. Step 5: Solve for x
    x = 386,410,544,599.10/714,292.76
  6. Step 6: Final answer
    x = 540,969.43

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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.