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Finding the Fourth Proportional to 571,038.40, 856,168.80 and 215,999.20

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Solution

The fourth proportional to 571,038.40, 856,168.80 and 215,999.20 is: 323,851.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,038.40 : 856,168.80 = 215,999.20 : x
  2. Step 2: Convert to fraction form
    571,038.40/856,168.80 = 215,999.20/x
  3. Step 3: Cross multiply
    571,038.40x = 856,168.80 × 215,999.20
  4. Step 4: Simplify right side
    571,038.40x = 184,931,775,864.96
  5. Step 5: Solve for x
    x = 184,931,775,864.96/571,038.40
  6. Step 6: Final answer
    x = 323,851.73

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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.