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Finding the Fourth Proportional to 1,047.70, 1,445.73 and 581.86

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Solution

The fourth proportional to 1,047.70, 1,445.73 and 581.86 is: 802.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.70 : 1,445.73 = 581.86 : x
  2. Step 2: Convert to fraction form
    1,047.70/1,445.73 = 581.86/x
  3. Step 3: Cross multiply
    1,047.70x = 1,445.73 × 581.86
  4. Step 4: Simplify right side
    1,047.70x = 841,212.46
  5. Step 5: Solve for x
    x = 841,212.46/1,047.70
  6. Step 6: Final answer
    x = 802.91

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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.