Home / 389,765.04-537,865.56-217,678.32

Finding the Fourth Proportional to 389,765.04, 537,865.56 and 217,678.32

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Solution

The fourth proportional to 389,765.04, 537,865.56 and 217,678.32 is: 300,390.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,765.04 : 537,865.56 = 217,678.32 : x
  2. Step 2: Convert to fraction form
    389,765.04/537,865.56 = 217,678.32/x
  3. Step 3: Cross multiply
    389,765.04x = 537,865.56 × 217,678.32
  4. Step 4: Simplify right side
    389,765.04x = 117,081,671,486.66
  5. Step 5: Solve for x
    x = 117,081,671,486.66/389,765.04
  6. Step 6: Final answer
    x = 300,390.39

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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.