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Finding the Fourth Proportional to 658,140.10, 987,210.15 and 325,672.90

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Solution

The fourth proportional to 658,140.10, 987,210.15 and 325,672.90 is: 488,509.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,140.10 : 987,210.15 = 325,672.90 : x
  2. Step 2: Convert to fraction form
    658,140.10/987,210.15 = 325,672.90/x
  3. Step 3: Cross multiply
    658,140.10x = 987,210.15 × 325,672.90
  4. Step 4: Simplify right side
    658,140.10x = 321,507,592,459.94
  5. Step 5: Solve for x
    x = 321,507,592,459.94/658,140.10
  6. Step 6: Final answer
    x = 488,509.35

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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.