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Finding the Fourth Proportional to 388,479.36, 536,064.48 and 286,560

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Solution

The fourth proportional to 388,479.36, 536,064.48 and 286,560 is: 395,425.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,479.36 : 536,064.48 = 286,560 : x
  2. Step 2: Convert to fraction form
    388,479.36/536,064.48 = 286,560/x
  3. Step 3: Cross multiply
    388,479.36x = 536,064.48 × 286,560
  4. Step 4: Simplify right side
    388,479.36x = 153,614,637,388.80
  5. Step 5: Solve for x
    x = 153,614,637,388.80/388,479.36
  6. Step 6: Final answer
    x = 395,425.48

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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.