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Finding the Fourth Proportional to 710,448.80, 980,406.60 and 388,150.88

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Solution

The fourth proportional to 710,448.80, 980,406.60 and 388,150.88 is: 535,641.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,448.80 : 980,406.60 = 388,150.88 : x
  2. Step 2: Convert to fraction form
    710,448.80/980,406.60 = 388,150.88/x
  3. Step 3: Cross multiply
    710,448.80x = 980,406.60 × 388,150.88
  4. Step 4: Simplify right side
    710,448.80x = 380,545,684,547.81
  5. Step 5: Solve for x
    x = 380,545,684,547.81/710,448.80
  6. Step 6: Final answer
    x = 535,641.25

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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.