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Finding the Fourth Proportional to 642,477.55, 963,038.16 and 215,608.64

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Solution

The fourth proportional to 642,477.55, 963,038.16 and 215,608.64 is: 323,185.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,477.55 : 963,038.16 = 215,608.64 : x
  2. Step 2: Convert to fraction form
    642,477.55/963,038.16 = 215,608.64/x
  3. Step 3: Cross multiply
    642,477.55x = 963,038.16 × 215,608.64
  4. Step 4: Simplify right side
    642,477.55x = 207,639,343,130.51
  5. Step 5: Solve for x
    x = 207,639,343,130.51/642,477.55
  6. Step 6: Final answer
    x = 323,185.37

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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.