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Finding the Fourth Proportional to 712,670.54, 983,458.88 and 390,383.28

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Solution

The fourth proportional to 712,670.54, 983,458.88 and 390,383.28 is: 538,714.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,670.54 : 983,458.88 = 390,383.28 : x
  2. Step 2: Convert to fraction form
    712,670.54/983,458.88 = 390,383.28/x
  3. Step 3: Cross multiply
    712,670.54x = 983,458.88 × 390,383.28
  4. Step 4: Simplify right side
    712,670.54x = 383,925,903,319.53
  5. Step 5: Solve for x
    x = 383,925,903,319.53/712,670.54
  6. Step 6: Final answer
    x = 538,714.43

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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.