Home / 711,453.28-982,136.40-420,973.52

Finding the Fourth Proportional to 711,453.28, 982,136.40 and 420,973.52

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Solution

The fourth proportional to 711,453.28, 982,136.40 and 420,973.52 is: 581,139.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,453.28 : 982,136.40 = 420,973.52 : x
  2. Step 2: Convert to fraction form
    711,453.28/982,136.40 = 420,973.52/x
  3. Step 3: Cross multiply
    711,453.28x = 982,136.40 × 420,973.52
  4. Step 4: Simplify right side
    711,453.28x = 413,453,417,428.13
  5. Step 5: Solve for x
    x = 413,453,417,428.13/711,453.28
  6. Step 6: Final answer
    x = 581,139.24

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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.