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Finding the Fourth Proportional to 645.61, 970.55 and 524.71

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Solution

The fourth proportional to 645.61, 970.55 and 524.71 is: 788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.61 : 970.55 = 524.71 : x
  2. Step 2: Convert to fraction form
    645.61/970.55 = 524.71/x
  3. Step 3: Cross multiply
    645.61x = 970.55 × 524.71
  4. Step 4: Simplify right side
    645.61x = 509,254.67
  5. Step 5: Solve for x
    x = 509,254.67/645.61
  6. Step 6: Final answer
    x = 788.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.