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Finding the Fourth Proportional to 879,140, 1,213,213.20 and 476,732.32

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Solution

The fourth proportional to 879,140, 1,213,213.20 and 476,732.32 is: 657,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,140 : 1,213,213.20 = 476,732.32 : x
  2. Step 2: Convert to fraction form
    879,140/1,213,213.20 = 476,732.32/x
  3. Step 3: Cross multiply
    879,140x = 1,213,213.20 × 476,732.32
  4. Step 4: Simplify right side
    879,140x = 578,377,943,490.62
  5. Step 5: Solve for x
    x = 578,377,943,490.62/879,140
  6. Step 6: Final answer
    x = 657,890.60

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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.