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Finding the Fourth Proportional to 722,842.16, 997,510.21 and 396,152.66

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Solution

The fourth proportional to 722,842.16, 997,510.21 and 396,152.66 is: 546,684.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,842.16 : 997,510.21 = 396,152.66 : x
  2. Step 2: Convert to fraction form
    722,842.16/997,510.21 = 396,152.66/x
  3. Step 3: Cross multiply
    722,842.16x = 997,510.21 × 396,152.66
  4. Step 4: Simplify right side
    722,842.16x = 395,166,323,068.66
  5. Step 5: Solve for x
    x = 395,166,323,068.66/722,842.16
  6. Step 6: Final answer
    x = 546,684.11

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.