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Finding the Fourth Proportional to 615,075.90, 922,613.85 and 490,659.90

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Solution

The fourth proportional to 615,075.90, 922,613.85 and 490,659.90 is: 735,989.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,075.90 : 922,613.85 = 490,659.90 : x
  2. Step 2: Convert to fraction form
    615,075.90/922,613.85 = 490,659.90/x
  3. Step 3: Cross multiply
    615,075.90x = 922,613.85 × 490,659.90
  4. Step 4: Simplify right side
    615,075.90x = 452,689,619,379.62
  5. Step 5: Solve for x
    x = 452,689,619,379.62/615,075.90
  6. Step 6: Final answer
    x = 735,989.85

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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.