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Finding the Fourth Proportional to 1,036.96, 1,430.16 and 644.08

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Solution

The fourth proportional to 1,036.96, 1,430.16 and 644.08 is: 888.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.96 : 1,430.16 = 644.08 : x
  2. Step 2: Convert to fraction form
    1,036.96/1,430.16 = 644.08/x
  3. Step 3: Cross multiply
    1,036.96x = 1,430.16 × 644.08
  4. Step 4: Simplify right side
    1,036.96x = 921,137.45
  5. Step 5: Solve for x
    x = 921,137.45/1,036.96
  6. Step 6: Final answer
    x = 888.31

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1.5x scale

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.