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Finding the Fourth Proportional to 368,459.80, 552,689.70 and 256,485.40

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Solution

The fourth proportional to 368,459.80, 552,689.70 and 256,485.40 is: 384,728.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,459.80 : 552,689.70 = 256,485.40 : x
  2. Step 2: Convert to fraction form
    368,459.80/552,689.70 = 256,485.40/x
  3. Step 3: Cross multiply
    368,459.80x = 552,689.70 × 256,485.40
  4. Step 4: Simplify right side
    368,459.80x = 141,756,838,780.38
  5. Step 5: Solve for x
    x = 141,756,838,780.38/368,459.80
  6. Step 6: Final answer
    x = 384,728.10

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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.