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Finding the Fourth Proportional to 615,640.60, 922,424.10 and 578,315.80

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Solution

The fourth proportional to 615,640.60, 922,424.10 and 578,315.80 is: 866,499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,640.60 : 922,424.10 = 578,315.80 : x
  2. Step 2: Convert to fraction form
    615,640.60/922,424.10 = 578,315.80/x
  3. Step 3: Cross multiply
    615,640.60x = 922,424.10 × 578,315.80
  4. Step 4: Simplify right side
    615,640.60x = 533,452,431,330.78
  5. Step 5: Solve for x
    x = 533,452,431,330.78/615,640.60
  6. Step 6: Final answer
    x = 866,499.76

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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.