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Finding the Fourth Proportional to 480,127.60, 720,643.26 and 243,640

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Solution

The fourth proportional to 480,127.60, 720,643.26 and 243,640 is: 365,689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,127.60 : 720,643.26 = 243,640 : x
  2. Step 2: Convert to fraction form
    480,127.60/720,643.26 = 243,640/x
  3. Step 3: Cross multiply
    480,127.60x = 720,643.26 × 243,640
  4. Step 4: Simplify right side
    480,127.60x = 175,577,523,866.40
  5. Step 5: Solve for x
    x = 175,577,523,866.40/480,127.60
  6. Step 6: Final answer
    x = 365,689.30

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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.