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Finding the Fourth Proportional to 1,319,603.04, 1,821,045.78 and 715,991.04

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Solution

The fourth proportional to 1,319,603.04, 1,821,045.78 and 715,991.04 is: 988,064.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,603.04 : 1,821,045.78 = 715,991.04 : x
  2. Step 2: Convert to fraction form
    1,319,603.04/1,821,045.78 = 715,991.04/x
  3. Step 3: Cross multiply
    1,319,603.04x = 1,821,045.78 × 715,991.04
  4. Step 4: Simplify right side
    1,319,603.04x = 1,303,852,461,909.81
  5. Step 5: Solve for x
    x = 1,303,852,461,909.81/1,319,603.04
  6. Step 6: Final answer
    x = 988,064.15

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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.