Home / 712,962.63-983,893.10-390,686.31

Finding the Fourth Proportional to 712,962.63, 983,893.10 and 390,686.31

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Solution

The fourth proportional to 712,962.63, 983,893.10 and 390,686.31 is: 539,149.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,962.63 : 983,893.10 = 390,686.31 : x
  2. Step 2: Convert to fraction form
    712,962.63/983,893.10 = 390,686.31/x
  3. Step 3: Cross multiply
    712,962.63x = 983,893.10 × 390,686.31
  4. Step 4: Simplify right side
    712,962.63x = 384,393,562,720.03
  5. Step 5: Solve for x
    x = 384,393,562,720.03/712,962.63
  6. Step 6: Final answer
    x = 539,149.66

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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.