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Finding the Fourth Proportional to 609,127, 840,976.56 and 391,423.84

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Solution

The fourth proportional to 609,127, 840,976.56 and 391,423.84 is: 540,409.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,127 : 840,976.56 = 391,423.84 : x
  2. Step 2: Convert to fraction form
    609,127/840,976.56 = 391,423.84/x
  3. Step 3: Cross multiply
    609,127x = 840,976.56 × 391,423.84
  4. Step 4: Simplify right side
    609,127x = 329,178,274,465.19
  5. Step 5: Solve for x
    x = 329,178,274,465.19/609,127
  6. Step 6: Final answer
    x = 540,409.92

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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.