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Finding the Fourth Proportional to 615,708.60, 921,813.30 and 545,724.60

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Solution

The fourth proportional to 615,708.60, 921,813.30 and 545,724.60 is: 817,036.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,708.60 : 921,813.30 = 545,724.60 : x
  2. Step 2: Convert to fraction form
    615,708.60/921,813.30 = 545,724.60/x
  3. Step 3: Cross multiply
    615,708.60x = 921,813.30 × 545,724.60
  4. Step 4: Simplify right side
    615,708.60x = 503,056,194,417.18
  5. Step 5: Solve for x
    x = 503,056,194,417.18/615,708.60
  6. Step 6: Final answer
    x = 817,036.17

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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.