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Finding the Fourth Proportional to 368,815.12, 508,938.60 and 207,679.12

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Solution

The fourth proportional to 368,815.12, 508,938.60 and 207,679.12 is: 286,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,815.12 : 508,938.60 = 207,679.12 : x
  2. Step 2: Convert to fraction form
    368,815.12/508,938.60 = 207,679.12/x
  3. Step 3: Cross multiply
    368,815.12x = 508,938.60 × 207,679.12
  4. Step 4: Simplify right side
    368,815.12x = 105,695,920,582.03
  5. Step 5: Solve for x
    x = 105,695,920,582.03/368,815.12
  6. Step 6: Final answer
    x = 286,582.40

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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.