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Finding the Fourth Proportional to 385,727.60, 578,591.40 and 236,428.40

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Solution

The fourth proportional to 385,727.60, 578,591.40 and 236,428.40 is: 354,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,727.60 : 578,591.40 = 236,428.40 : x
  2. Step 2: Convert to fraction form
    385,727.60/578,591.40 = 236,428.40/x
  3. Step 3: Cross multiply
    385,727.60x = 578,591.40 × 236,428.40
  4. Step 4: Simplify right side
    385,727.60x = 136,795,438,955.76
  5. Step 5: Solve for x
    x = 136,795,438,955.76/385,727.60
  6. Step 6: Final answer
    x = 354,642.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.