Home / 390,531.64-538,830.30-229,335.16

Finding the Fourth Proportional to 390,531.64, 538,830.30 and 229,335.16

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Solution

The fourth proportional to 390,531.64, 538,830.30 and 229,335.16 is: 316,421.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,531.64 : 538,830.30 = 229,335.16 : x
  2. Step 2: Convert to fraction form
    390,531.64/538,830.30 = 229,335.16/x
  3. Step 3: Cross multiply
    390,531.64x = 538,830.30 × 229,335.16
  4. Step 4: Simplify right side
    390,531.64x = 123,572,733,063.35
  5. Step 5: Solve for x
    x = 123,572,733,063.35/390,531.64
  6. Step 6: Final answer
    x = 316,421.82

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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.