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Finding the Fourth Proportional to 659,406.10, 989,109.15 and 578,049.70

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Solution

The fourth proportional to 659,406.10, 989,109.15 and 578,049.70 is: 867,074.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,406.10 : 989,109.15 = 578,049.70 : x
  2. Step 2: Convert to fraction form
    659,406.10/989,109.15 = 578,049.70/x
  3. Step 3: Cross multiply
    659,406.10x = 989,109.15 × 578,049.70
  4. Step 4: Simplify right side
    659,406.10x = 571,754,247,424.76
  5. Step 5: Solve for x
    x = 571,754,247,424.76/659,406.10
  6. Step 6: Final answer
    x = 867,074.55

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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.