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Finding the Fourth Proportional to 1,402,505.05, 1,935,373.53 and 813,758.93

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Solution

The fourth proportional to 1,402,505.05, 1,935,373.53 and 813,758.93 is: 1,122,938.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402,505.05 : 1,935,373.53 = 813,758.93 : x
  2. Step 2: Convert to fraction form
    1,402,505.05/1,935,373.53 = 813,758.93/x
  3. Step 3: Cross multiply
    1,402,505.05x = 1,935,373.53 × 813,758.93
  4. Step 4: Simplify right side
    1,402,505.05x = 1,574,927,492,923.12
  5. Step 5: Solve for x
    x = 1,574,927,492,923.12/1,402,505.05
  6. Step 6: Final answer
    x = 1,122,938.91

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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.