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Finding the Fourth Proportional to 536,647.40, 804,971.10 and 387,931.40

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Solution

The fourth proportional to 536,647.40, 804,971.10 and 387,931.40 is: 581,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,647.40 : 804,971.10 = 387,931.40 : x
  2. Step 2: Convert to fraction form
    536,647.40/804,971.10 = 387,931.40/x
  3. Step 3: Cross multiply
    536,647.40x = 804,971.10 × 387,931.40
  4. Step 4: Simplify right side
    536,647.40x = 312,273,565,782.54
  5. Step 5: Solve for x
    x = 312,273,565,782.54/536,647.40
  6. Step 6: Final answer
    x = 581,897.10

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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.