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Finding the Fourth Proportional to 315,848.64, 435,740.88 and 220,410.72

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Solution

The fourth proportional to 315,848.64, 435,740.88 and 220,410.72 is: 304,075.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,848.64 : 435,740.88 = 220,410.72 : x
  2. Step 2: Convert to fraction form
    315,848.64/435,740.88 = 220,410.72/x
  3. Step 3: Cross multiply
    315,848.64x = 435,740.88 × 220,410.72
  4. Step 4: Simplify right side
    315,848.64x = 96,041,961,094.23
  5. Step 5: Solve for x
    x = 96,041,961,094.23/315,848.64
  6. Step 6: Final answer
    x = 304,075.91

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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.