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Finding the Fourth Proportional to 389,271.20, 537,194.40 and 210,423.20

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Solution

The fourth proportional to 389,271.20, 537,194.40 and 210,423.20 is: 290,384.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,271.20 : 537,194.40 = 210,423.20 : x
  2. Step 2: Convert to fraction form
    389,271.20/537,194.40 = 210,423.20/x
  3. Step 3: Cross multiply
    389,271.20x = 537,194.40 × 210,423.20
  4. Step 4: Simplify right side
    389,271.20x = 113,038,164,670.08
  5. Step 5: Solve for x
    x = 113,038,164,670.08/389,271.20
  6. Step 6: Final answer
    x = 290,384.09

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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.