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Finding the Fourth Proportional to 660,473.60, 990,710.40 and 424,277.60

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Solution

The fourth proportional to 660,473.60, 990,710.40 and 424,277.60 is: 636,416.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,473.60 : 990,710.40 = 424,277.60 : x
  2. Step 2: Convert to fraction form
    660,473.60/990,710.40 = 424,277.60/x
  3. Step 3: Cross multiply
    660,473.60x = 990,710.40 × 424,277.60
  4. Step 4: Simplify right side
    660,473.60x = 420,336,230,807.04
  5. Step 5: Solve for x
    x = 420,336,230,807.04/660,473.60
  6. Step 6: Final answer
    x = 636,416.40

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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.