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Finding the Fourth Proportional to 553,275.10, 763,512.12 and 311,560.60

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Solution

The fourth proportional to 553,275.10, 763,512.12 and 311,560.60 is: 429,949.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,275.10 : 763,512.12 = 311,560.60 : x
  2. Step 2: Convert to fraction form
    553,275.10/763,512.12 = 311,560.60/x
  3. Step 3: Cross multiply
    553,275.10x = 763,512.12 × 311,560.60
  4. Step 4: Simplify right side
    553,275.10x = 237,880,294,214.47
  5. Step 5: Solve for x
    x = 237,880,294,214.47/553,275.10
  6. Step 6: Final answer
    x = 429,949.39

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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.