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Finding the Fourth Proportional to 571,215.32, 855,225.54 and 430,533.08

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Solution

The fourth proportional to 571,215.32, 855,225.54 and 430,533.08 is: 644,595.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,215.32 : 855,225.54 = 430,533.08 : x
  2. Step 2: Convert to fraction form
    571,215.32/855,225.54 = 430,533.08/x
  3. Step 3: Cross multiply
    571,215.32x = 855,225.54 × 430,533.08
  4. Step 4: Simplify right side
    571,215.32x = 368,202,885,830.86
  5. Step 5: Solve for x
    x = 368,202,885,830.86/571,215.32
  6. Step 6: Final answer
    x = 644,595.61

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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.