Home / 1,430.39-1,973.93-800.91

Finding the Fourth Proportional to 1,430.39, 1,973.93 and 800.91

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Solution

The fourth proportional to 1,430.39, 1,973.93 and 800.91 is: 1,105.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.39 : 1,973.93 = 800.91 : x
  2. Step 2: Convert to fraction form
    1,430.39/1,973.93 = 800.91/x
  3. Step 3: Cross multiply
    1,430.39x = 1,973.93 × 800.91
  4. Step 4: Simplify right side
    1,430.39x = 1,580,936.27
  5. Step 5: Solve for x
    x = 1,580,936.27/1,430.39
  6. Step 6: Final answer
    x = 1,105.25

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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.