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Finding the Fourth Proportional to 822,078.40, 1,234,384.80 and 448,830.40

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Solution

The fourth proportional to 822,078.40, 1,234,384.80 and 448,830.40 is: 673,937.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,078.40 : 1,234,384.80 = 448,830.40 : x
  2. Step 2: Convert to fraction form
    822,078.40/1,234,384.80 = 448,830.40/x
  3. Step 3: Cross multiply
    822,078.40x = 1,234,384.80 × 448,830.40
  4. Step 4: Simplify right side
    822,078.40x = 554,029,423,537.92
  5. Step 5: Solve for x
    x = 554,029,423,537.92/822,078.40
  6. Step 6: Final answer
    x = 673,937.45

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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.