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Finding the Fourth Proportional to 875,406.78, 1,208,061 and 472,998.78

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Solution

The fourth proportional to 875,406.78, 1,208,061 and 472,998.78 is: 652,738.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,406.78 : 1,208,061 = 472,998.78 : x
  2. Step 2: Convert to fraction form
    875,406.78/1,208,061 = 472,998.78/x
  3. Step 3: Cross multiply
    875,406.78x = 1,208,061 × 472,998.78
  4. Step 4: Simplify right side
    875,406.78x = 571,411,379,165.58
  5. Step 5: Solve for x
    x = 571,411,379,165.58/875,406.78
  6. Step 6: Final answer
    x = 652,738.12

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1.5x scale

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.