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Finding the Fourth Proportional to 607,405.80, 910,590.30 and 429,352.68

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Solution

The fourth proportional to 607,405.80, 910,590.30 and 429,352.68 is: 643,662.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,405.80 : 910,590.30 = 429,352.68 : x
  2. Step 2: Convert to fraction form
    607,405.80/910,590.30 = 429,352.68/x
  3. Step 3: Cross multiply
    607,405.80x = 910,590.30 × 429,352.68
  4. Step 4: Simplify right side
    607,405.80x = 390,964,385,687.00
  5. Step 5: Solve for x
    x = 390,964,385,687.00/607,405.80
  6. Step 6: Final answer
    x = 643,662.58

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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.