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Finding the Fourth Proportional to 319,075.20, 478,175.40 and 260,026.20

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Solution

The fourth proportional to 319,075.20, 478,175.40 and 260,026.20 is: 389,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,075.20 : 478,175.40 = 260,026.20 : x
  2. Step 2: Convert to fraction form
    319,075.20/478,175.40 = 260,026.20/x
  3. Step 3: Cross multiply
    319,075.20x = 478,175.40 × 260,026.20
  4. Step 4: Simplify right side
    319,075.20x = 124,338,132,195.48
  5. Step 5: Solve for x
    x = 124,338,132,195.48/319,075.20
  6. Step 6: Final answer
    x = 389,682.85

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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.