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Finding the Fourth Proportional to 1,088.51, 1,501.74 and 715.64

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Solution

The fourth proportional to 1,088.51, 1,501.74 and 715.64 is: 987.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.51 : 1,501.74 = 715.64 : x
  2. Step 2: Convert to fraction form
    1,088.51/1,501.74 = 715.64/x
  3. Step 3: Cross multiply
    1,088.51x = 1,501.74 × 715.64
  4. Step 4: Simplify right side
    1,088.51x = 1,074,697.70
  5. Step 5: Solve for x
    x = 1,074,697.70/1,088.51
  6. Step 6: Final answer
    x = 987.32

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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.