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Finding the Fourth Proportional to 642,607.20, 962,989.20 and 472,802.40

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Solution

The fourth proportional to 642,607.20, 962,989.20 and 472,802.40 is: 708,525.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,607.20 : 962,989.20 = 472,802.40 : x
  2. Step 2: Convert to fraction form
    642,607.20/962,989.20 = 472,802.40/x
  3. Step 3: Cross multiply
    642,607.20x = 962,989.20 × 472,802.40
  4. Step 4: Simplify right side
    642,607.20x = 455,303,604,934.08
  5. Step 5: Solve for x
    x = 455,303,604,934.08/642,607.20
  6. Step 6: Final answer
    x = 708,525.53

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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.