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Finding the Fourth Proportional to 626,831.87, 865,003.72 and 340,345.40

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Solution

The fourth proportional to 626,831.87, 865,003.72 and 340,345.40 is: 469,663.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,831.87 : 865,003.72 = 340,345.40 : x
  2. Step 2: Convert to fraction form
    626,831.87/865,003.72 = 340,345.40/x
  3. Step 3: Cross multiply
    626,831.87x = 865,003.72 × 340,345.40
  4. Step 4: Simplify right side
    626,831.87x = 294,400,037,084.89
  5. Step 5: Solve for x
    x = 294,400,037,084.89/626,831.87
  6. Step 6: Final answer
    x = 469,663.48

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1.5x scale

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.