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Finding the Fourth Proportional to 510.98, 705.28 and 427.95

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Solution

The fourth proportional to 510.98, 705.28 and 427.95 is: 590.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.98 : 705.28 = 427.95 : x
  2. Step 2: Convert to fraction form
    510.98/705.28 = 427.95/x
  3. Step 3: Cross multiply
    510.98x = 705.28 × 427.95
  4. Step 4: Simplify right side
    510.98x = 301,823.51
  5. Step 5: Solve for x
    x = 301,823.51/510.98
  6. Step 6: Final answer
    x = 590.68

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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.