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Finding the Fourth Proportional to 565,507.04, 780,379.92 and 310,856.40

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Solution

The fourth proportional to 565,507.04, 780,379.92 and 310,856.40 is: 428,970.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,507.04 : 780,379.92 = 310,856.40 : x
  2. Step 2: Convert to fraction form
    565,507.04/780,379.92 = 310,856.40/x
  3. Step 3: Cross multiply
    565,507.04x = 780,379.92 × 310,856.40
  4. Step 4: Simplify right side
    565,507.04x = 242,586,092,563.49
  5. Step 5: Solve for x
    x = 242,586,092,563.49/565,507.04
  6. Step 6: Final answer
    x = 428,970.95

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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.