Home / 878,870.40-1,212,916.80-496,965.12

Finding the Fourth Proportional to 878,870.40, 1,212,916.80 and 496,965.12

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Solution

The fourth proportional to 878,870.40, 1,212,916.80 and 496,965.12 is: 685,854.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,870.40 : 1,212,916.80 = 496,965.12 : x
  2. Step 2: Convert to fraction form
    878,870.40/1,212,916.80 = 496,965.12/x
  3. Step 3: Cross multiply
    878,870.40x = 1,212,916.80 × 496,965.12
  4. Step 4: Simplify right side
    878,870.40x = 602,777,343,062.02
  5. Step 5: Solve for x
    x = 602,777,343,062.02/878,870.40
  6. Step 6: Final answer
    x = 685,854.64

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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.