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Finding the Fourth Proportional to 712,552.64, 983,312.82 and 390,262.64

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Solution

The fourth proportional to 712,552.64, 983,312.82 and 390,262.64 is: 538,557.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,552.64 : 983,312.82 = 390,262.64 : x
  2. Step 2: Convert to fraction form
    712,552.64/983,312.82 = 390,262.64/x
  3. Step 3: Cross multiply
    712,552.64x = 983,312.82 × 390,262.64
  4. Step 4: Simplify right side
    712,552.64x = 383,750,257,079.05
  5. Step 5: Solve for x
    x = 383,750,257,079.05/712,552.64
  6. Step 6: Final answer
    x = 538,557.06

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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.