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Finding the Fourth Proportional to 388,210.37, 535,717.14 and 218,411.69

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Solution

The fourth proportional to 388,210.37, 535,717.14 and 218,411.69 is: 301,400.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,210.37 : 535,717.14 = 218,411.69 : x
  2. Step 2: Convert to fraction form
    388,210.37/535,717.14 = 218,411.69/x
  3. Step 3: Cross multiply
    388,210.37x = 535,717.14 × 218,411.69
  4. Step 4: Simplify right side
    388,210.37x = 117,006,886,653.71
  5. Step 5: Solve for x
    x = 117,006,886,653.71/388,210.37
  6. Step 6: Final answer
    x = 301,400.72

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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.