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Finding the Fourth Proportional to 879,368, 1,213,528 and 497,386.56

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Solution

The fourth proportional to 879,368, 1,213,528 and 497,386.56 is: 686,393.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,368 : 1,213,528 = 497,386.56 : x
  2. Step 2: Convert to fraction form
    879,368/1,213,528 = 497,386.56/x
  3. Step 3: Cross multiply
    879,368x = 1,213,528 × 497,386.56
  4. Step 4: Simplify right side
    879,368x = 603,592,517,383.68
  5. Step 5: Solve for x
    x = 603,592,517,383.68/879,368
  6. Step 6: Final answer
    x = 686,393.54

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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.