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Finding the Fourth Proportional to 903.92, 1,247.54 and 510.94

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Solution

The fourth proportional to 903.92, 1,247.54 and 510.94 is: 705.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.92 : 1,247.54 = 510.94 : x
  2. Step 2: Convert to fraction form
    903.92/1,247.54 = 510.94/x
  3. Step 3: Cross multiply
    903.92x = 1,247.54 × 510.94
  4. Step 4: Simplify right side
    903.92x = 637,412.41
  5. Step 5: Solve for x
    x = 637,412.41/903.92
  6. Step 6: Final answer
    x = 705.16

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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.