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Finding the Fourth Proportional to 565,314.19, 780,136.58 and 307,193.18

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Solution

The fourth proportional to 565,314.19, 780,136.58 and 307,193.18 is: 423,928.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,314.19 : 780,136.58 = 307,193.18 : x
  2. Step 2: Convert to fraction form
    565,314.19/780,136.58 = 307,193.18/x
  3. Step 3: Cross multiply
    565,314.19x = 780,136.58 × 307,193.18
  4. Step 4: Simplify right side
    565,314.19x = 239,652,633,711.82
  5. Step 5: Solve for x
    x = 239,652,633,711.82/565,314.19
  6. Step 6: Final answer
    x = 423,928.21

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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.