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Finding the Fourth Proportional to 545,152.20, 817,728.30 and 520,657.80

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Solution

The fourth proportional to 545,152.20, 817,728.30 and 520,657.80 is: 780,986.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,152.20 : 817,728.30 = 520,657.80 : x
  2. Step 2: Convert to fraction form
    545,152.20/817,728.30 = 520,657.80/x
  3. Step 3: Cross multiply
    545,152.20x = 817,728.30 × 520,657.80
  4. Step 4: Simplify right side
    545,152.20x = 425,756,617,675.74
  5. Step 5: Solve for x
    x = 425,756,617,675.74/545,152.20
  6. Step 6: Final answer
    x = 780,986.70

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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.