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Finding the Fourth Proportional to 710,448.40, 980,407.32 and 388,151.56

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Solution

The fourth proportional to 710,448.40, 980,407.32 and 388,151.56 is: 535,642.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,448.40 : 980,407.32 = 388,151.56 : x
  2. Step 2: Convert to fraction form
    710,448.40/980,407.32 = 388,151.56/x
  3. Step 3: Cross multiply
    710,448.40x = 980,407.32 × 388,151.56
  4. Step 4: Simplify right side
    710,448.40x = 380,546,630,693.42
  5. Step 5: Solve for x
    x = 380,546,630,693.42/710,448.40
  6. Step 6: Final answer
    x = 535,642.89

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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.