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Finding the Fourth Proportional to 315,913.20, 473,178.60 and 191,036.40

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Solution

The fourth proportional to 315,913.20, 473,178.60 and 191,036.40 is: 286,136.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,913.20 : 473,178.60 = 191,036.40 : x
  2. Step 2: Convert to fraction form
    315,913.20/473,178.60 = 191,036.40/x
  3. Step 3: Cross multiply
    315,913.20x = 473,178.60 × 191,036.40
  4. Step 4: Simplify right side
    315,913.20x = 90,394,336,301.04
  5. Step 5: Solve for x
    x = 90,394,336,301.04/315,913.20
  6. Step 6: Final answer
    x = 286,136.62

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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.