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Finding the Fourth Proportional to 570,118.32, 855,299.64 and 210,290.40

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Solution

The fourth proportional to 570,118.32, 855,299.64 and 210,290.40 is: 315,480.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,118.32 : 855,299.64 = 210,290.40 : x
  2. Step 2: Convert to fraction form
    570,118.32/855,299.64 = 210,290.40/x
  3. Step 3: Cross multiply
    570,118.32x = 855,299.64 × 210,290.40
  4. Step 4: Simplify right side
    570,118.32x = 179,861,303,415.46
  5. Step 5: Solve for x
    x = 179,861,303,415.46/570,118.32
  6. Step 6: Final answer
    x = 315,480.66

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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.