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Finding the Fourth Proportional to 637,920.40, 956,880.60 and 258,840.40

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Solution

The fourth proportional to 637,920.40, 956,880.60 and 258,840.40 is: 388,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,920.40 : 956,880.60 = 258,840.40 : x
  2. Step 2: Convert to fraction form
    637,920.40/956,880.60 = 258,840.40/x
  3. Step 3: Cross multiply
    637,920.40x = 956,880.60 × 258,840.40
  4. Step 4: Simplify right side
    637,920.40x = 247,679,357,256.24
  5. Step 5: Solve for x
    x = 247,679,357,256.24/637,920.40
  6. Step 6: Final answer
    x = 388,260.60

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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.