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Finding the Fourth Proportional to 528,008.40, 791,818.20 and 261,680.40

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Solution

The fourth proportional to 528,008.40, 791,818.20 and 261,680.40 is: 392,424.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,008.40 : 791,818.20 = 261,680.40 : x
  2. Step 2: Convert to fraction form
    528,008.40/791,818.20 = 261,680.40/x
  3. Step 3: Cross multiply
    528,008.40x = 791,818.20 × 261,680.40
  4. Step 4: Simplify right side
    528,008.40x = 207,203,303,303.28
  5. Step 5: Solve for x
    x = 207,203,303,303.28/528,008.40
  6. Step 6: Final answer
    x = 392,424.26

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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.