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Finding the Fourth Proportional to 1,275,929.78, 1,913,831.06 and 477,152.60

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Solution

The fourth proportional to 1,275,929.78, 1,913,831.06 and 477,152.60 is: 715,705.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275,929.78 : 1,913,831.06 = 477,152.60 : x
  2. Step 2: Convert to fraction form
    1,275,929.78/1,913,831.06 = 477,152.60/x
  3. Step 3: Cross multiply
    1,275,929.78x = 1,913,831.06 × 477,152.60
  4. Step 4: Simplify right side
    1,275,929.78x = 913,189,454,284.84
  5. Step 5: Solve for x
    x = 913,189,454,284.84/1,275,929.78
  6. Step 6: Final answer
    x = 715,705.11

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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.