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Finding the Fourth Proportional to 615,639.60, 922,422.60 and 578,314.80

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Solution

The fourth proportional to 615,639.60, 922,422.60 and 578,314.80 is: 866,498.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,639.60 : 922,422.60 = 578,314.80 : x
  2. Step 2: Convert to fraction form
    615,639.60/922,422.60 = 578,314.80/x
  3. Step 3: Cross multiply
    615,639.60x = 922,422.60 × 578,314.80
  4. Step 4: Simplify right side
    615,639.60x = 533,450,641,434.48
  5. Step 5: Solve for x
    x = 533,450,641,434.48/615,639.60
  6. Step 6: Final answer
    x = 866,498.26

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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.