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Finding the Fourth Proportional to 645,203.76, 890,283.72 and 369,518.76

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Solution

The fourth proportional to 645,203.76, 890,283.72 and 369,518.76 is: 509,880.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,203.76 : 890,283.72 = 369,518.76 : x
  2. Step 2: Convert to fraction form
    645,203.76/890,283.72 = 369,518.76/x
  3. Step 3: Cross multiply
    645,203.76x = 890,283.72 × 369,518.76
  4. Step 4: Simplify right side
    645,203.76x = 328,976,536,262.59
  5. Step 5: Solve for x
    x = 328,976,536,262.59/645,203.76
  6. Step 6: Final answer
    x = 509,880.07

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Double scale
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Similar ratio
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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.