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Finding the Fourth Proportional to 708,478.54, 977,836.88 and 491,276.63

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Solution

The fourth proportional to 708,478.54, 977,836.88 and 491,276.63 is: 678,056.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,478.54 : 977,836.88 = 491,276.63 : x
  2. Step 2: Convert to fraction form
    708,478.54/977,836.88 = 491,276.63/x
  3. Step 3: Cross multiply
    708,478.54x = 977,836.88 × 491,276.63
  4. Step 4: Simplify right side
    708,478.54x = 480,388,404,639.73
  5. Step 5: Solve for x
    x = 480,388,404,639.73/708,478.54
  6. Step 6: Final answer
    x = 678,056.40

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.