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Finding the Fourth Proportional to 565,255.53, 780,058.80 and 310,606.74

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Solution

The fourth proportional to 565,255.53, 780,058.80 and 310,606.74 is: 428,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,255.53 : 780,058.80 = 310,606.74 : x
  2. Step 2: Convert to fraction form
    565,255.53/780,058.80 = 310,606.74/x
  3. Step 3: Cross multiply
    565,255.53x = 780,058.80 × 310,606.74
  4. Step 4: Simplify right side
    565,255.53x = 242,291,520,876.31
  5. Step 5: Solve for x
    x = 242,291,520,876.31/565,255.53
  6. Step 6: Final answer
    x = 428,640.69

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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.