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Finding the Fourth Proportional to 1,430.90, 1,973.40 and 933.36

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Solution

The fourth proportional to 1,430.90, 1,973.40 and 933.36 is: 1,287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.90 : 1,973.40 = 933.36 : x
  2. Step 2: Convert to fraction form
    1,430.90/1,973.40 = 933.36/x
  3. Step 3: Cross multiply
    1,430.90x = 1,973.40 × 933.36
  4. Step 4: Simplify right side
    1,430.90x = 1,841,881.72
  5. Step 5: Solve for x
    x = 1,841,881.72/1,430.90
  6. Step 6: Final answer
    x = 1,287.22

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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.