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Finding the Fourth Proportional to 509.71, 702.79 and 430.89

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Solution

The fourth proportional to 509.71, 702.79 and 430.89 is: 594.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.71 : 702.79 = 430.89 : x
  2. Step 2: Convert to fraction form
    509.71/702.79 = 430.89/x
  3. Step 3: Cross multiply
    509.71x = 702.79 × 430.89
  4. Step 4: Simplify right side
    509.71x = 302,825.18
  5. Step 5: Solve for x
    x = 302,825.18/509.71
  6. Step 6: Final answer
    x = 594.11

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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.