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Finding the Fourth Proportional to 776,391, 1,071,435.96 and 436,859.28

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Solution

The fourth proportional to 776,391, 1,071,435.96 and 436,859.28 is: 602,875.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,391 : 1,071,435.96 = 436,859.28 : x
  2. Step 2: Convert to fraction form
    776,391/1,071,435.96 = 436,859.28/x
  3. Step 3: Cross multiply
    776,391x = 1,071,435.96 × 436,859.28
  4. Step 4: Simplify right side
    776,391x = 468,066,742,051.71
  5. Step 5: Solve for x
    x = 468,066,742,051.71/776,391
  6. Step 6: Final answer
    x = 602,875.02

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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.