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Finding the Fourth Proportional to 579,817.20, 869,725.80 and 402,670.20

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Solution

The fourth proportional to 579,817.20, 869,725.80 and 402,670.20 is: 604,005.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,817.20 : 869,725.80 = 402,670.20 : x
  2. Step 2: Convert to fraction form
    579,817.20/869,725.80 = 402,670.20/x
  3. Step 3: Cross multiply
    579,817.20x = 869,725.80 × 402,670.20
  4. Step 4: Simplify right side
    579,817.20x = 350,212,661,831.16
  5. Step 5: Solve for x
    x = 350,212,661,831.16/579,817.20
  6. Step 6: Final answer
    x = 604,005.30

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Half scale
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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.