Home / 1,948.40-2,686.80-1,528

Finding the Fourth Proportional to 1,948.40, 2,686.80 and 1,528

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Solution

The fourth proportional to 1,948.40, 2,686.80 and 1,528 is: 2,107.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.40 : 2,686.80 = 1,528 : x
  2. Step 2: Convert to fraction form
    1,948.40/2,686.80 = 1,528/x
  3. Step 3: Cross multiply
    1,948.40x = 2,686.80 × 1,528
  4. Step 4: Simplify right side
    1,948.40x = 4,105,430.40
  5. Step 5: Solve for x
    x = 4,105,430.40/1,948.40
  6. Step 6: Final answer
    x = 2,107.08

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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.