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Finding the Fourth Proportional to 638,314.02, 880,809.80 and 380,139.89

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Solution

The fourth proportional to 638,314.02, 880,809.80 and 380,139.89 is: 524,555.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,314.02 : 880,809.80 = 380,139.89 : x
  2. Step 2: Convert to fraction form
    638,314.02/880,809.80 = 380,139.89/x
  3. Step 3: Cross multiply
    638,314.02x = 880,809.80 × 380,139.89
  4. Step 4: Simplify right side
    638,314.02x = 334,830,934,178.17
  5. Step 5: Solve for x
    x = 334,830,934,178.17/638,314.02
  6. Step 6: Final answer
    x = 524,555.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.