Home / 429,740.23-643,999.06-316,530.18

Finding the Fourth Proportional to 429,740.23, 643,999.06 and 316,530.18

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Solution

The fourth proportional to 429,740.23, 643,999.06 and 316,530.18 is: 474,345.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,740.23 : 643,999.06 = 316,530.18 : x
  2. Step 2: Convert to fraction form
    429,740.23/643,999.06 = 316,530.18/x
  3. Step 3: Cross multiply
    429,740.23x = 643,999.06 × 316,530.18
  4. Step 4: Simplify right side
    429,740.23x = 203,845,138,381.63
  5. Step 5: Solve for x
    x = 203,845,138,381.63/429,740.23
  6. Step 6: Final answer
    x = 474,345.02

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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.