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Finding the Fourth Proportional to 539,085.80, 808,628.70 and 339,631.40

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Solution

The fourth proportional to 539,085.80, 808,628.70 and 339,631.40 is: 509,447.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,085.80 : 808,628.70 = 339,631.40 : x
  2. Step 2: Convert to fraction form
    539,085.80/808,628.70 = 339,631.40/x
  3. Step 3: Cross multiply
    539,085.80x = 808,628.70 × 339,631.40
  4. Step 4: Simplify right side
    539,085.80x = 274,635,697,461.18
  5. Step 5: Solve for x
    x = 274,635,697,461.18/539,085.80
  6. Step 6: Final answer
    x = 509,447.10

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Similar ratio
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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.