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Finding the Fourth Proportional to 1,153.10, 1,720.78 and 1,030.08

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Solution

The fourth proportional to 1,153.10, 1,720.78 and 1,030.08 is: 1,537.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.10 : 1,720.78 = 1,030.08 : x
  2. Step 2: Convert to fraction form
    1,153.10/1,720.78 = 1,030.08/x
  3. Step 3: Cross multiply
    1,153.10x = 1,720.78 × 1,030.08
  4. Step 4: Simplify right side
    1,153.10x = 1,772,541.06
  5. Step 5: Solve for x
    x = 1,772,541.06/1,153.10
  6. Step 6: Final answer
    x = 1,537.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.