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Finding the Fourth Proportional to 259,312.80, 388,969.20 and 243,566.40

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Solution

The fourth proportional to 259,312.80, 388,969.20 and 243,566.40 is: 365,349.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,312.80 : 388,969.20 = 243,566.40 : x
  2. Step 2: Convert to fraction form
    259,312.80/388,969.20 = 243,566.40/x
  3. Step 3: Cross multiply
    259,312.80x = 388,969.20 × 243,566.40
  4. Step 4: Simplify right side
    259,312.80x = 94,739,827,754.88
  5. Step 5: Solve for x
    x = 94,739,827,754.88/259,312.80
  6. Step 6: Final answer
    x = 365,349.60

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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.