Home / 1,430.58-2,143.71-916.50

Finding the Fourth Proportional to 1,430.58, 2,143.71 and 916.50

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Solution

The fourth proportional to 1,430.58, 2,143.71 and 916.50 is: 1,373.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.58 : 2,143.71 = 916.50 : x
  2. Step 2: Convert to fraction form
    1,430.58/2,143.71 = 916.50/x
  3. Step 3: Cross multiply
    1,430.58x = 2,143.71 × 916.50
  4. Step 4: Simplify right side
    1,430.58x = 1,964,710.22
  5. Step 5: Solve for x
    x = 1,964,710.22/1,430.58
  6. Step 6: Final answer
    x = 1,373.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.