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Finding the Fourth Proportional to 399,085.20, 598,627.80 and 265,532.40

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Solution

The fourth proportional to 399,085.20, 598,627.80 and 265,532.40 is: 398,298.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,085.20 : 598,627.80 = 265,532.40 : x
  2. Step 2: Convert to fraction form
    399,085.20/598,627.80 = 265,532.40/x
  3. Step 3: Cross multiply
    399,085.20x = 598,627.80 × 265,532.40
  4. Step 4: Simplify right side
    399,085.20x = 158,955,076,440.72
  5. Step 5: Solve for x
    x = 158,955,076,440.72/399,085.20
  6. Step 6: Final answer
    x = 398,298.60

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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.