Home / 714,108.20-985,487.45-391,818.21

Finding the Fourth Proportional to 714,108.20, 985,487.45 and 391,818.21

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Solution

The fourth proportional to 714,108.20, 985,487.45 and 391,818.21 is: 540,719.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,108.20 : 985,487.45 = 391,818.21 : x
  2. Step 2: Convert to fraction form
    714,108.20/985,487.45 = 391,818.21/x
  3. Step 3: Cross multiply
    714,108.20x = 985,487.45 × 391,818.21
  4. Step 4: Simplify right side
    714,108.20x = 386,131,931,831.13
  5. Step 5: Solve for x
    x = 386,131,931,831.13/714,108.20
  6. Step 6: Final answer
    x = 540,719.08

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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.