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Finding the Fourth Proportional to 402,386.80, 602,705.40 and 244,339.60

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Solution

The fourth proportional to 402,386.80, 602,705.40 and 244,339.60 is: 365,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,386.80 : 602,705.40 = 244,339.60 : x
  2. Step 2: Convert to fraction form
    402,386.80/602,705.40 = 244,339.60/x
  3. Step 3: Cross multiply
    402,386.80x = 602,705.40 × 244,339.60
  4. Step 4: Simplify right side
    402,386.80x = 147,264,796,353.84
  5. Step 5: Solve for x
    x = 147,264,796,353.84/402,386.80
  6. Step 6: Final answer
    x = 365,978.20

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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.