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Finding the Fourth Proportional to 478,053.80, 717,080.70 and 265,477.40

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Solution

The fourth proportional to 478,053.80, 717,080.70 and 265,477.40 is: 398,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,053.80 : 717,080.70 = 265,477.40 : x
  2. Step 2: Convert to fraction form
    478,053.80/717,080.70 = 265,477.40/x
  3. Step 3: Cross multiply
    478,053.80x = 717,080.70 × 265,477.40
  4. Step 4: Simplify right side
    478,053.80x = 190,368,719,826.18
  5. Step 5: Solve for x
    x = 190,368,719,826.18/478,053.80
  6. Step 6: Final answer
    x = 398,216.10

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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.