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Finding the Fourth Proportional to 508.76, 702.14 and 287.77

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Solution

The fourth proportional to 508.76, 702.14 and 287.77 is: 397.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.76 : 702.14 = 287.77 : x
  2. Step 2: Convert to fraction form
    508.76/702.14 = 287.77/x
  3. Step 3: Cross multiply
    508.76x = 702.14 × 287.77
  4. Step 4: Simplify right side
    508.76x = 202,054.83
  5. Step 5: Solve for x
    x = 202,054.83/508.76
  6. Step 6: Final answer
    x = 397.15

Related Problems

Find fourth proportional to 254.38, 351.07 and 143.89
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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.