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Finding the Fourth Proportional to 539,128.40, 808,303.80 and 352,245.20

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Solution

The fourth proportional to 539,128.40, 808,303.80 and 352,245.20 is: 528,113.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,128.40 : 808,303.80 = 352,245.20 : x
  2. Step 2: Convert to fraction form
    539,128.40/808,303.80 = 352,245.20/x
  3. Step 3: Cross multiply
    539,128.40x = 808,303.80 × 352,245.20
  4. Step 4: Simplify right side
    539,128.40x = 284,721,133,691.76
  5. Step 5: Solve for x
    x = 284,721,133,691.76/539,128.40
  6. Step 6: Final answer
    x = 528,113.77

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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.