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Finding the Fourth Proportional to 971.79, 1,341.08 and 529.70

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Solution

The fourth proportional to 971.79, 1,341.08 and 529.70 is: 730.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.79 : 1,341.08 = 529.70 : x
  2. Step 2: Convert to fraction form
    971.79/1,341.08 = 529.70/x
  3. Step 3: Cross multiply
    971.79x = 1,341.08 × 529.70
  4. Step 4: Simplify right side
    971.79x = 710,362.71
  5. Step 5: Solve for x
    x = 710,362.71/971.79
  6. Step 6: Final answer
    x = 730.99

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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.