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Finding the Fourth Proportional to 385,622.70, 578,434.05 and 250,320.30

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Solution

The fourth proportional to 385,622.70, 578,434.05 and 250,320.30 is: 375,480.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,622.70 : 578,434.05 = 250,320.30 : x
  2. Step 2: Convert to fraction form
    385,622.70/578,434.05 = 250,320.30/x
  3. Step 3: Cross multiply
    385,622.70x = 578,434.05 × 250,320.30
  4. Step 4: Simplify right side
    385,622.70x = 144,793,784,926.22
  5. Step 5: Solve for x
    x = 144,793,784,926.22/385,622.70
  6. Step 6: Final answer
    x = 375,480.45

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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.