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Finding the Fourth Proportional to 553,071.49, 763,253.42 and 311,363.24

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Solution

The fourth proportional to 553,071.49, 763,253.42 and 311,363.24 is: 429,689.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,071.49 : 763,253.42 = 311,363.24 : x
  2. Step 2: Convert to fraction form
    553,071.49/763,253.42 = 311,363.24/x
  3. Step 3: Cross multiply
    553,071.49x = 763,253.42 × 311,363.24
  4. Step 4: Simplify right side
    553,071.49x = 237,649,054,754.42
  5. Step 5: Solve for x
    x = 237,649,054,754.42/553,071.49
  6. Step 6: Final answer
    x = 429,689.58

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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.