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Finding the Fourth Proportional to 526,203.18, 789,503.61 and 315,987.66

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Solution

The fourth proportional to 526,203.18, 789,503.61 and 315,987.66 is: 474,100.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,203.18 : 789,503.61 = 315,987.66 : x
  2. Step 2: Convert to fraction form
    526,203.18/789,503.61 = 315,987.66/x
  3. Step 3: Cross multiply
    526,203.18x = 789,503.61 × 315,987.66
  4. Step 4: Simplify right side
    526,203.18x = 249,473,398,285.45
  5. Step 5: Solve for x
    x = 249,473,398,285.45/526,203.18
  6. Step 6: Final answer
    x = 474,100.89

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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.