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Finding the Fourth Proportional to 443,426.20, 665,139.30 and 256,341.40

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Solution

The fourth proportional to 443,426.20, 665,139.30 and 256,341.40 is: 384,512.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,426.20 : 665,139.30 = 256,341.40 : x
  2. Step 2: Convert to fraction form
    443,426.20/665,139.30 = 256,341.40/x
  3. Step 3: Cross multiply
    443,426.20x = 665,139.30 × 256,341.40
  4. Step 4: Simplify right side
    443,426.20x = 170,502,739,357.02
  5. Step 5: Solve for x
    x = 170,502,739,357.02/443,426.20
  6. Step 6: Final answer
    x = 384,512.10

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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.