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Finding the Fourth Proportional to 520,903.40, 781,355.10 and 456,621.80

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Solution

The fourth proportional to 520,903.40, 781,355.10 and 456,621.80 is: 684,932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,903.40 : 781,355.10 = 456,621.80 : x
  2. Step 2: Convert to fraction form
    520,903.40/781,355.10 = 456,621.80/x
  3. Step 3: Cross multiply
    520,903.40x = 781,355.10 × 456,621.80
  4. Step 4: Simplify right side
    520,903.40x = 356,783,772,201.18
  5. Step 5: Solve for x
    x = 356,783,772,201.18/520,903.40
  6. Step 6: Final answer
    x = 684,932.70

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1.5x scale

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.