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Finding the Fourth Proportional to 1,430.60, 1,973.16 and 906.14

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Solution

The fourth proportional to 1,430.60, 1,973.16 and 906.14 is: 1,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.60 : 1,973.16 = 906.14 : x
  2. Step 2: Convert to fraction form
    1,430.60/1,973.16 = 906.14/x
  3. Step 3: Cross multiply
    1,430.60x = 1,973.16 × 906.14
  4. Step 4: Simplify right side
    1,430.60x = 1,787,959.20
  5. Step 5: Solve for x
    x = 1,787,959.20/1,430.60
  6. Step 6: Final answer
    x = 1,249.80

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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.