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Finding the Fourth Proportional to 904.28, 1,246.53 and 707.45

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Solution

The fourth proportional to 904.28, 1,246.53 and 707.45 is: 975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.28 : 1,246.53 = 707.45 : x
  2. Step 2: Convert to fraction form
    904.28/1,246.53 = 707.45/x
  3. Step 3: Cross multiply
    904.28x = 1,246.53 × 707.45
  4. Step 4: Simplify right side
    904.28x = 881,851.42
  5. Step 5: Solve for x
    x = 881,851.42/904.28
  6. Step 6: Final answer
    x = 975.20

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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.