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Finding the Fourth Proportional to 1,152.74, 1,590.81 and 710.93

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Solution

The fourth proportional to 1,152.74, 1,590.81 and 710.93 is: 981.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.74 : 1,590.81 = 710.93 : x
  2. Step 2: Convert to fraction form
    1,152.74/1,590.81 = 710.93/x
  3. Step 3: Cross multiply
    1,152.74x = 1,590.81 × 710.93
  4. Step 4: Simplify right side
    1,152.74x = 1,130,954.55
  5. Step 5: Solve for x
    x = 1,130,954.55/1,152.74
  6. Step 6: Final answer
    x = 981.10

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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.