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Finding the Fourth Proportional to 520,901.40, 781,352.10 and 456,619.80

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Solution

The fourth proportional to 520,901.40, 781,352.10 and 456,619.80 is: 684,929.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,901.40 : 781,352.10 = 456,619.80 : x
  2. Step 2: Convert to fraction form
    520,901.40/781,352.10 = 456,619.80/x
  3. Step 3: Cross multiply
    520,901.40x = 781,352.10 × 456,619.80
  4. Step 4: Simplify right side
    520,901.40x = 356,780,839,631.58
  5. Step 5: Solve for x
    x = 356,780,839,631.58/520,901.40
  6. Step 6: Final answer
    x = 684,929.70

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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.