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Finding the Fourth Proportional to 287,596.70, 431,395.05 and 265,945.40

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Solution

The fourth proportional to 287,596.70, 431,395.05 and 265,945.40 is: 398,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,596.70 : 431,395.05 = 265,945.40 : x
  2. Step 2: Convert to fraction form
    287,596.70/431,395.05 = 265,945.40/x
  3. Step 3: Cross multiply
    287,596.70x = 431,395.05 × 265,945.40
  4. Step 4: Simplify right side
    287,596.70x = 114,727,529,130.27
  5. Step 5: Solve for x
    x = 114,727,529,130.27/287,596.70
  6. Step 6: Final answer
    x = 398,918.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.