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Finding the Fourth Proportional to 1,085,152, 1,497,509.76 and 661,216

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Solution

The fourth proportional to 1,085,152, 1,497,509.76 and 661,216 is: 912,478.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085,152 : 1,497,509.76 = 661,216 : x
  2. Step 2: Convert to fraction form
    1,085,152/1,497,509.76 = 661,216/x
  3. Step 3: Cross multiply
    1,085,152x = 1,497,509.76 × 661,216
  4. Step 4: Simplify right side
    1,085,152x = 990,177,413,468.16
  5. Step 5: Solve for x
    x = 990,177,413,468.16/1,085,152
  6. Step 6: Final answer
    x = 912,478.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.