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Finding the Fourth Proportional to 539,256.80, 808,885.20 and 290,424.80

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Solution

The fourth proportional to 539,256.80, 808,885.20 and 290,424.80 is: 435,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,256.80 : 808,885.20 = 290,424.80 : x
  2. Step 2: Convert to fraction form
    539,256.80/808,885.20 = 290,424.80/x
  3. Step 3: Cross multiply
    539,256.80x = 808,885.20 × 290,424.80
  4. Step 4: Simplify right side
    539,256.80x = 234,920,322,432.96
  5. Step 5: Solve for x
    x = 234,920,322,432.96/539,256.80
  6. Step 6: Final answer
    x = 435,637.20

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Double scale
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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.