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Finding the Fourth Proportional to 917,254.40, 1,375,420.80 and 418,054.40

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Solution

The fourth proportional to 917,254.40, 1,375,420.80 and 418,054.40 is: 626,871.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,254.40 : 1,375,420.80 = 418,054.40 : x
  2. Step 2: Convert to fraction form
    917,254.40/1,375,420.80 = 418,054.40/x
  3. Step 3: Cross multiply
    917,254.40x = 1,375,420.80 × 418,054.40
  4. Step 4: Simplify right side
    917,254.40x = 575,000,717,291.52
  5. Step 5: Solve for x
    x = 575,000,717,291.52/917,254.40
  6. Step 6: Final answer
    x = 626,871.58

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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.