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Finding the Fourth Proportional to 1,402,503.05, 1,935,370.77 and 813,756.93

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Solution

The fourth proportional to 1,402,503.05, 1,935,370.77 and 813,756.93 is: 1,122,936.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402,503.05 : 1,935,370.77 = 813,756.93 : x
  2. Step 2: Convert to fraction form
    1,402,503.05/1,935,370.77 = 813,756.93/x
  3. Step 3: Cross multiply
    1,402,503.05x = 1,935,370.77 × 813,756.93
  4. Step 4: Simplify right side
    1,402,503.05x = 1,574,921,376,784.17
  5. Step 5: Solve for x
    x = 1,574,921,376,784.17/1,402,503.05
  6. Step 6: Final answer
    x = 1,122,936.15

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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.