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Finding the Fourth Proportional to 1,369,602.68, 1,890,657.02 and 818,512.79

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Solution

The fourth proportional to 1,369,602.68, 1,890,657.02 and 818,512.79 is: 1,129,909.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369,602.68 : 1,890,657.02 = 818,512.79 : x
  2. Step 2: Convert to fraction form
    1,369,602.68/1,890,657.02 = 818,512.79/x
  3. Step 3: Cross multiply
    1,369,602.68x = 1,890,657.02 × 818,512.79
  4. Step 4: Simplify right side
    1,369,602.68x = 1,547,526,944,966.28
  5. Step 5: Solve for x
    x = 1,547,526,944,966.28/1,369,602.68
  6. Step 6: Final answer
    x = 1,129,909.41

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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.