Home / 554,156.72-764,721.00-312,437.20

Finding the Fourth Proportional to 554,156.72, 764,721.00 and 312,437.20

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Solution

The fourth proportional to 554,156.72, 764,721.00 and 312,437.20 is: 431,154.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,156.72 : 764,721.00 = 312,437.20 : x
  2. Step 2: Convert to fraction form
    554,156.72/764,721.00 = 312,437.20/x
  3. Step 3: Cross multiply
    554,156.72x = 764,721.00 × 312,437.20
  4. Step 4: Simplify right side
    554,156.72x = 238,927,282,635.41
  5. Step 5: Solve for x
    x = 238,927,282,635.41/554,156.72
  6. Step 6: Final answer
    x = 431,154.71

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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.