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Finding the Fourth Proportional to 750.76, 1,030.53 and 666.01

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Solution

The fourth proportional to 750.76, 1,030.53 and 666.01 is: 914.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.76 : 1,030.53 = 666.01 : x
  2. Step 2: Convert to fraction form
    750.76/1,030.53 = 666.01/x
  3. Step 3: Cross multiply
    750.76x = 1,030.53 × 666.01
  4. Step 4: Simplify right side
    750.76x = 686,343.29
  5. Step 5: Solve for x
    x = 686,343.29/750.76
  6. Step 6: Final answer
    x = 914.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.